If WooCommerce plugin support tells you that issue is related to the premium theme that you use then ask them to show you the video of how it works on your site with their official theme – Storefront. Like I did. I enabled the Storefront theme, checked your shipping and provided screenshots https://prnt.sc/12579mb to confirm and prove that it works the same way as with our theme. And everything is clear.
Now I would ask you to check your the apple pay / google pay on single product with the Storefront theme. Does it work fine when you go to Appearance > Themes > and enable Storefront? You can provide us with screenshot of how it works with the Storefront using Lightshot screenshot tool or with a short video using the Gyzo gif free tool.
