Literally anything. There is no functional difference between distros at almost any level but package management anymore. This honestly sounds like an environment and driver problem to me.

What's your hardware set look like?

https://www.youtube.com/watch?v=WjABILVAz5Y

this dude twitch and yt streams from linux and everything you listed seems to work for him

Sounds like it might be more of a DE problem than a distro problem. I'd recommend trying KDE Plasma if you haven't already.

Yeah, we’re gonna need more details, like your DE, GPU, maybe the monitor?

But I would start by test booting images and just… see what OBS package works out of the box. Try Cachy or Nobara with KDE, plus whatever their respective wikis say about OBS usage.

This might be wrong but I think many of screen sharing related issues actually come from wayland. If you're on wayland and can switch to X11 on your current system I'd try that first before deciding on a new distro.

I’d recommend cachyos because of cachy update which runs updates all your stuff regardless of where you got them. Flatpak, Pac-Man, appimage whatever

I’ve used it for 3 months or so and it’s great, just works.

OpenSUSE Aeon

Decent audio experience?

You can tweak any distro but, pay attention to using Jack + PREEMPT_RT kernel + Xlibre (X11).

Avoid Wayland (especially with nvidia GPU), avoid Pipewire and avoid Gnome desktop.

I suggest starting out with Debian stable as the base. There are specialised AV Linux distros available but nothing beats knowing what you're doing from the outset.

If you need the very latest version of a particular app not available as a distro package, Flatpak is your friend. Again, Debian '.debs' and AppImage are most prevalent third party packages outside the proprietary app stores of Flathub & Snapcraft.

LMDE Cinnamon. Boring. Rock solid.