OBS can capture wayland output just fine. At least in recent versions 29.X for sure. I don't know how the Debian/Raspberry Pi OS repositories updates them. Hopefully they have a newer version these days.

Kooha is pretty nice, remember that it needs a portal.

I know newer versions of Spectacle can do short video recordings. But that's a Plasma app.

I really hope wlroots screen capture lands in ffmpeg sometime soon. But I haven't heard any rumblings that that's even on their radar.

VokoscreenNG is a screencasting tool that works with Raspberry Pi OS, I tested it on my Pi 400. And it's also easy to install, just sudo apt install vokoscreen-ng gstreamer1.0-pipewire.

I've updated the post.