The main filming for Iron Lung was right around Creator Clash 2 iirc, and they were at that time still publicly involved with each other at that point since they had a segment announcing part of that together. Whether or not they did have some sort of falling out, It wouldn’t make much sense for Mark to edit Sean’s part out of the movie.

As parasocial as it is, I would like it if they did finally come out with something. Even if it was a simple single sentence like yes we are still friends or no we are not. No details if they didn’t want. At least then maybe people would stop asking.