This is my workflow too

Works on the laptop screen or docked on my ultrawide

Named workspaces and window rules to open application windows on a specific workspace

Then I bind super + 1 - 0 to switch between them

1 terminals 2 browsers 3 code 4 slack 5 teams (ugh) 6 discord 7 xfreerdp 8 empty 9 empty 0 keepassxc

When I boot up everything opens in the same place

The overview feature is great in Niri

I also use noctalia mainly for a bar at the top

https://ismaelmartinez.github.io/teams-for-linux/installation/#rhelfedoracentos

Adding the repo and installing with dnf

This will avoid issues with permissions on the flatpak side

Did you try the native Fedora package rather than just the flatpak?

Also have you tried with a pair of USB headphones with an inline mic?

I’ve been using this for the past year or so no problem

https://github.com/IsmaelMartinez/teams-for-linux

Also pavucontrol it’s very useful for figuring out where your audio is going