No, he registered as a Republican when he turned 18 in 2021. There was nothing after indicating anything about him as a Progressive, nor before, for that matter. He made one donation one time once to one such organization spamming as a poll. He never made one again, and unsubscribed from them 2 years later.
He voted in the 2022 Midterms as a registered Republican.
"In short, it’s one of those spammy PACs that carpet bombs your inbox, delivering emails with splashy colors and wild fonts and using every trick in the book to convince people to give small amounts of money.
Crooks’s donation, the PAC told Drop Site in a statement, “came in response to an email about tuning into the inauguration.” In other words, the mere fact of his having given to this PAC on this day, based on that kind of an email, tells us very little about his politics."
https://www.dropsitenews.com/p/trumps-shooter-gave-15-to-a-progressive
^ I got that link from another comment by AlumaEnbo66.