Regarding the previously posted example of changing the quantity selector to a drop-down type on the product page of the Shopify theme "Dawn/Rise" (https://store-dojo.com/products/2024-08-13), this is an example of how to implement it using theme blocks by editing the code, rather than adding custom Liquid in the theme editor.
Example of how to implement a drop-down quantity selector using code editing in the theme "Rise/Dawn"

[Setting Step 1: Product Information Section] Add the schema to "sections/main-product.liquid" and the label to "ja.schema.json"

[Setting Step 2: Product Information Section] Add the code to "sections/main-product.liquid"

How to use: Add a block in the theme editor, remove (or hide) the existing quantity selector, and set the maximum number of selections.

