Then why are they asking for a phone number?
All older accounts don’t have to do this, I asked many of my guild members, and they didn’t had to give phone number.
And it is not my own account, I only created one, just for the leader team to start streaming, depending who of us are hosting the guild raids.
I’m sorry but there must be another way, a company will NEVER ask for personal content. And a phone number is.