My daughter has this on iOS. It affects about 10 of the worlds she owns, and it seems permanent. This content has been unavailable to her for over a month.
One more thing in case it's relevant: I have bought minecoins successfully for this child's account in the past. And the account where it succeeded belongs to a 9-year-old; the failing account belongs to a 7-year-old.
Me too, and in my case it has REALLY messed us up:
I just wanted to try out an RTX texture pack on our realm, with one PC that is capable of it. Without warning, it a) uploaded the texture pack to the realm, b) offered that pack to everyone including iOS players, even though those devices aren't even remotely RTX capable (c) I'm assuming my kids chose "accept and download" like they're accustomed to doing) ... and now they have broken rendering that I can't fix. I can't deactivate the texture pack (no UI to do that), and I can't even upload a copy of the world without the texture pack (because that hangs at the "Initializing upload" stage - I've tried that both from a PC and from an iPhone).