Websites are not scrollable (not responding to touch swipe up/down gesture) in bottom area (around bottom 5% marked on screen).
I have noticed on that area i am unable to scroll webpage only if i have moved address bar the top of browser (marked on screen2). Issue appears only when webpage is long and in due to scrolling all bars are going to be hidden.
Tested on XS, 13 mini - same effect, ios 15.3 and earlier. https://feedbackassistant.apple.com/feedback/9837732
cant upload images, so you may find here https://imgur.com/xXHM97x https://imgur.com/CZhsOEs
