CHANGING BUY IT NOW BUTTON WHEN PRICE IS 0

Copy and paste this code wheen you want to change the text of the button to something else when the product is 0

{% comment %}
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Unauthorized copying, modification, distribution, or use
of this code or any portion of it, is strictly prohibited.
Violators will be prosecuted to the fullest extent of the law.
---------------------------------------------------------
{% endcomment %}


{% liquid 
    assign current_variant = product.selected_or_first_available_variant

    assign mt = block.settings.mt | prepend: 'mt-'
    assign mb = block.settings.mb | prepend: 'mb-'
%}

{%- if product.gift_card? -%}
    {%- render 'product-gift-card-form', form: form -%}
{%- endif -%}

{% if current_variant.price > 0 %}
  <div class="product-buy-buttons {{ mt }} {{ mb }}" {{ block.shopify_attributes }}>
      <div class="product-buy-buttons-inner {{ block.settings.qty_field_position | prepend: 'qty-position-' }}">
          {% if block.settings.show_qty_field %}
              <div class="quantity-wrapper me-3">
                  <button 
                      class="btn"
                      type="button"
                      data-mode="minus"
                      onclick="onClickQtyPlusMinus(this)" 
                      aria-label="{{ 'general.accessibility.decrease_qty' | t }}">
                      <svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
                          <line x1="5" y1="12" x2="19" y2="12"></line>
                      </svg>
                  </button>
                  <input
                      class="form-control" 
                      name="quantity"
                      type="text"
                      value="1"
                      data-min-qty="1"
                      aria-label="{{ 'product.quantity' | t }}">
                  <button 
                      class="btn btn-plus"
                      type="button"
                      data-mode="plus"
                      onclick="onClickQtyPlusMinus(this)"
                      aria-label="{{ 'general.accessibility.increase_qty' | t }}">
                      <svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
                          <line x1="12" y1="5" x2="12" y2="19"></line><line x1="5" y1="12" x2="19" y2="12"></line>
                      </svg>
                  </button>
              </div>
          {% endif %}
          <button
              class="btn-atc btn btn-primary w-100"
              type="submit"
              name="add"
              data-text-add-to-cart="{{ 'product.add_to_cart' | t }}"
              {% unless current_variant.available %}
                  disabled
              {% endunless %}>
              {% if current_variant.available %}
                  <span class="btn-atc-text">
                      {{ 'product.add_to_cart' | t }}
                  </span>
              {% else %}
                  <span class="btn-atc-text">
                      {{ 'product.sold_out' | t }}
                  </span>
              {% endif %}
              {% if block.settings.atc_btn_show_price %}
                  -
                  <span class="btn-atc-price">
                     {{ current_variant.price | money }}
                  </span>
              {% endif %}
          </button>
      </div>
      
      {% if block.settings.show_dynamic_buttons %}
          <div class="product-form-dynamic-buttons mt-5 pb-2">
              {{ form | payment_button }}
          </div>
      {% endif %}
      
      {% if block.settings.show_buy_btn or settings.wishlist_enable %}
          <div class="d-flex mt-4">
              {% if block.settings.show_buy_btn %}
                  <button 
                      class="btn-buy btn btn-sm btn-outline-secondary w-100 {% if settings.wishlist_enable %}me-2{% endif %}" 
                      type="button"
                      onclick="onClickBuyBtn(this, event)">
                      {{ 'product.buy_it_now' | t }}
                  </button>
              {% endif %}
              {% if settings.wishlist_enable %}
                  <button 
                      class="btn-wishlist-add-remove btn btn-sm btn-outline-secondary w-100 d-flex align-items-center justify-content-center {% if section.settings.form_show_buy_btn %}ms-2{% endif %}"
                      type="button"
                      data-product-handle="{{ product.handle }}"
                      data-text-add="{{ 'general.wishlist.add_to_wishlist' | t }}"
                      data-text-remove="{{ 'general.wishlist.remove_from_wishlist' | t }}"
                      aria-label="{{ 'general.wishlist.add_to_wishlist' | t }}"
                      onclick="addOrRemoveFromWishlist(this)">
                      <svg xmlns="http://www.w3.org/2000/svg" class="me-2" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
                          <path d="M20.84 4.61a5.5 5.5 0 0 0-7.78 0L12 5.67l-1.06-1.06a5.5 5.5 0 0 0-7.78 7.78l1.06 1.06L12 21.23l7.78-7.78 1.06-1.06a5.5 5.5 0 0 0 0-7.78z"></path>
                      </svg>
                      <span>{{ 'general.wishlist.btn_label' | t }}</span>
                  </button>
              {% endif %}
          </div>
      {% endif %}
  </div>
{% else %}
  <a href="/pages/contact-us" class="btn btn-primary w-100">
    {{ 'product.get_a_quote' | t }}
  </a>
{% endif %}

at the bottom of the code, you can change this in the theme content area to change the text

{% else %}
  <a href="/pages/contact-us" class="btn btn-primary w-100">
    {{ 'product.get_a_quote' | t }}
  </a>
{% endif %}