Can I interchange them with antennas from other cards? What should I look for? I have a Wifi 6e card if that helps. I’m not sure of the Bluetooth version.
My Playstation controllers on Linux are having connection drift when my in-game character will sometimes not stop moving for a bit when I move in a direction.

Anything marketed as a PC Bluetooth/Wifi antenna will work. They’re basically just fancy pieces of wire cut to a precise length with a connector on one end (you can get more complicated ones, but there’s usually no reason to).
Anything that looks similar to this will work fine. Just make sure it says somewhere that it has an “RP-SMA” connector.