Ralph Bohner played by Evan Peters in WANDAVISION was the witness Jimmy Woo (Randall Park) was looking for in a newly released deleted scene. (via IGN)
Peter Maximoff was really just Tommy Shepherd with an Americanized version of Pietro's name but his character matched more to Tommy Shepherd
Ralph Bohner seems like he was a one-off joke to get around not having Pietro in WandaVision.
Evan Peters is a great actor but he has never played Pietro in my opinion. I think his character in X-Men would have been much more successful if they had just done their research and named him Tommy Shepherd. I would've had zero problems with that because it felt like a true accurate portrayal of Speed.
Quicksilver, as a character, has been fucked over so many times with less than informed writing and I want people to know, I love Evan Peters. He's a great actor but character wise, he's never portrayed Pietro.