Sorry for the issue and thanks for your question. I don't believe this is possible right now, to my knowledge. I also have not seen a request similar to yours on the user voice site yet. There are a few related to Match Frame. I encourage you to submit what you'd like to see here: Premiere Pro: Hot (3022 ideas) – Adobe video & audio apps
Match frame, switch to the other sequence and then reverse match frame.
Thank you for your responses.
Indeed this is what I've been doing until now eikonoklastes, guess I'll just have to stick to this method.
For those who would be interested, I precise that if what you wanted was to make an IN / OUT selection after the match frame + reverse match frame to then insert or overwrite from one sequence to another, it is indeed impossible with the classic IN / OUT method. BUT you can still use the clipboard by making a IN / OUT selection, lift or extract it (+ ctrl Z if you want to keep it) and then switch to the other sequence and then ctrl V to overwrite OR shift ctrl V to insert.