Used to be that if you were reading a news article on a website in Safari and there was a block of text that was not filling the width of the screen you could double-tap it to auto-size it to the screen width which made it easier to read. On forums like this in particular, it was a quick way to get at the body of a post without that sidebar making everything smaller.
When done with that block, you could double-tap again and it would pull back and resize the page to its original width.
This is a very handy and much-used feature for me, but it's not working on iOS13.
Any idea how to get it back? Or is there a new gesture that's different than double-tapping now?