Tier Price Rendering/Display on the product page from the tier_prices template from the Catalog Module.
Tier Price is used when you want to display different prices based on the Customer Group and Qty Level.
You can add different prices structure for the qty level with Fixed or Discount Type on the original price from the admin Panel product page.
The tier Price on the Product page will be rendered below the Main Price with a label like,
Buy 5 for $40 each and save 10%
When you explore the tier_prices.phtml file, given statement generate dynamically based on user qty.
catalog_product_prices.xml file used to display all types of pricing on the Product details page.
catalog_product_prices XML will be called inside the Catalog module Base area default.xml file with the argument,
<block class="Magento\Framework\Pricing\Render" name="product.price.render.default">
<arguments>
<argument name="price_render_handle" xsi:type="string">catalog_product_prices</argument>
<argument name="use_link_for_as_low_as" xsi:type="boolean">true</argument>
<!-- set "override" configuration settings here -->
</arguments>
</block>
Template declaration in the layout for the simple, virtual, grouped, and downloadable product types,
vendor/magento/module-catalog/view/base/layout/catalog_product_prices.xml
<item name="tier_price" xsi:type="array">
<item name="render_template" xsi:type="string">Magento_Catalog::product/price/tier_prices.phtml</item>
</item>
If you want to check the Configurable product, a template will be on a different module
vendor/magento/module-configurable-product/view/base/layout/catalog_product_prices.xml
<item name="tier_price" xsi:type="array">
<item name="render_class" xsi:type="string">Magento\ConfigurableProduct\Pricing\Render\TierPriceBox</item>
<item name="render_template" xsi:type="string">Magento_ConfigurableProduct::product/price/tier_price.phtml</item>
</item>
Bundle Product template declaration Layout XML,
vendor/magento/module-bundle/view/base/layout/catalog_product_prices.xml
<item name="tier_price" xsi:type="array">
<item name="render_template" xsi:type="string">Magento_Bundle::product/price/tier_prices.phtml</item>
</item>
Based on the Product type, You can modify the template if you want to change tier price rendering logic.