Compatibility with site | WordPress.org

I tried your solution as the one I am currently using doesn’t seem supported anymore.

However I can’t get it to work on the shop product page (grouped product). Clicking on them doesn’t do anything.

The styling also doesn’t really seem to work with my theme ?

One last thing: it looks like the buttons are not compatible with the new WooCommerce HPOS.

Are there any solutions for my issues :)?

The page I need help with: [log in to see the link]