Just thought about another clue for Professor X as a cameo....
This past episode, we saw the kids' powers develop and expand...
Speed got his powers similar to Quicksilver...
Wiccan gets his powers from his mom....but...
When Billy stopped Tommy to show his powers...he all of a sudden expressed telepathic powers and hearing someone in danger....something that hasn't been shown by Wanda up to this point explicitly, and he hears and sees Vision outside the bubble
I'm thinking Professor X does show up to speak with Wanda telepathically to calm her down
When you think about the lyrics of all the songs in the intros, it's all a theme of confusion and keeping the lie going....
We also see that Wanda is very Magneto-like in her movements and the angrier she gets, the more powerful she becomes....
Who better else understands Magneto and his tendencies other than Professor X..
I could be wrong, but those seem like strong clues to me