I am getting this too, that is the BGA "Play now" lobby won't display completely and nothing can be selected on the lobby page, so no new games can be started or joined on my iPad; I can't even see a list of lobby games available to play.
It occurs on my old iPad that won't upgrade beyond ios v12.5.6.
I had cleared my browsing history and thought it may be related to this, but can't find any settings which help this situation, either in iPad settings or on my BGA account.
It occurs in these browsers, Safari, Opera, Firefox on my iPad.
It occurs on an identical iPad using the same userid.
It occurs on a new Boardgamearena userid.
However, the lobby works fine on an iPhone 12 and an old laptop running windows 10.
I hope this helps.
Geoff