Did you find an answer to this question by any chance?

theoratically YES, you can seamless coop with convergence mod with friends, however they must install the same mods you use.

do not forget to disable EAC btw

seamless co-op uses its own exe file and has separate servers from the base game (for these reasons you won't get banned for using seamless coop) and is fully compatible with convergence.

I played seamless and convergence with a friend, works perfectly

i played reforged with seemless co-op, and i know convergence can work with it as well. i think people have made youtube videos about how to do it.

Why are people answering now when I have lost all interest in anything that has ever mattered to me.