That IS an unbearable wait, I feel bad for you if from February 2021, because even I've had econ slow back since then.
That may be a call to see what it is, and you can say I told you too 😆 if it helps.
But it is unnerving and sad, iBooks are promised to be dealt with on their time table, and they can't even confirm yet if they're lost. "They're in a vault." I'll believe it when I see them back, till then ya keep extending estimates. Some of us may get a payday eventually.
I'm just as unhappy, but I try not to dissuade cause it's not my place.