As stated I have tested this on several different sites. I have already turned off all plugins and removed all custom code from my child themes functions file.
With Smooth Scroll activated I cannot click any buttons on Android with Chrome. The Chrome version is 94.0.4606.61.
I have tested this on a Samsung Galaxy Note 10+ and a Samsung Galaxy S21 Ultra. These are physical phones not emulators. As soon as I deactivate Smooth Scroll the buttons work.
Again I have deactivated all plugins and just left Pro and Smooth Scroll active and then the buttons stop working. (When I say buttons I mean button elements, links in text, links on headline elements, links on image elements etc.) If I then deactivate smooth scroll the buttons etc. start behaving as normal.
If you visit the site on an Android Phone with the latest version of Android and the latest version of Chrome or (perhaps a Samsung Phone??) you will see even a basic button element doesn’t work with Smooth Scroll activate. Try clicking the “More about us” button.