I'm in a similar situation as the OP, @Tee4 . I've used eSIMs from Airalo for the past two summers on my iPhone 12 Pro. Just went to add one for an upcoming trip, and now the whole eSIM section is gone from my cellular settings area. Did update to iO...
FWIW, my daughter just had the same issue - she couldn't call out, hearing the message, “Hi, public mobile here. Sorry your call cannot be completed as dialled. Please check the number and try again.” and when I tried to call her, I was told I couldn...