I am comparing them to themselves. They have had 6 1:1 collabs since this time 2022. Why would Ame leaving make it happen more frequently, if at all.Wdym?
I guess you are saying that they didn't do many collabs even when both of them are still in Hololive? That's not true though. From 2023, they have been collabing kinda semi-regularly, more than many of the popular HoloEN pairings like Takamori, BaeRys, Iname, Ametori, Kronmei, etc. Gura even came out of her "hiatus" once just to collab with Ame. I think they are only beaten by the most recent Autofister when it comes to number of collabs.