Yes. There's an episode on Renee's podcast where they basically laid out how he got brought back into wrestling. FOX wanted CM Punk on their studio show, so they had Renee bridge the gap between Punk and FOX/WWE since Renee was still in somewhat communication with him. He credited her for bringing him back into wrestling. I think the FOX show reinvigorated his love for pro wrestling since he was working with his friends (Renee, Joe, etc).
AEW reached out to Punk before they even started. They wanted to bring him in from the jump like they did with Jericho and Moxley. He turned them down because he wanted to wait and see. I guess AEW became enough of an established brand that he decided to sign with them. My opinion, I think that's probably where some of the bad blood came from between him & the Elite.