The reasoning behind why it would be helpful to add domain clears to genshin impact ones is because it would help if your trying to make a complation of grinding for materials (artifacts, talents, weekly bosses and weapon ascension) or if you want...

Make a capture mode so we can record each game record separately.

Know the time in your video when you joined a new game

It would be nice to capture that one run where, after 12 thousand attempts, you complete the level. Maybe it could start right before you die, just before the holy run, or when you click play on a level?

The finals is a popular arena FPS and having highlights and game events in record options makes sense.

Deep Rock Galactic doesn't have highlights supported, and even though it's not the most popular game is would still be nice.

This would make it easier to spot clips