I am having the exact same problem, I have the Storefront Pro theme active and I have my whole store set up. I have a section for the WooCommerce Sidebar and every widget I use works on the desktop and iPad but doesn’t work on mobile. I have Product filter widgets in the sidebar(price, color, size). The price toggle works but the rest is just a gray box that you can’t click on your phone. My theme also came with a search bar in the header and that has the same issue as well so I disabled it.
The Page I’m talking about: https://mckenzieempire.com/shop