Very recently I had several complaints that iPad users running iPadOS (13.x) could not see pages that used a repeater element. These same users were having problems with Chrome and Firefox on the 13.x iPads. iPhone 13.x was was/is no issue.
To verify I upgraded my older iPad 12.4 (which was having no problem viewing the pages) to 13.5 and immediately noticed the problem. The elements that should be rendered by the repeater element do not 'visually' appear on the screen. However, they're actually there - you just can't see them, and if you click randomly on the blank screen you'll eventually click on