ASUS BT-500 is a good BT adapter

In my experience, Bluetooth 5.0 is pretty great. I mainly use Bluetooth for audio and there's about a 300 ms delay (which is noticeable but not too bad), but I just tested with a Switch pro controller and it felt pretty much instantaneous; I can't tell the difference from wired. Granted, I did my test on a NES emulator, so maybe it's more noticeable in an FPS. I'm pretty confident that it couldn't have been more than a few frames or so of delay though, so I would say it's within 50-60 ms.

I use the Asus BT500 and it works pretty well. The only caveat is that on kernel versions before I think 5.13 or 5.14, you need to compile and install a kernel module after every kernel update for it to work. Support is now mainlined, though, so if you're on a recent release of Pop_OS it should be a non-issue.

Here is a link

It's a ASUS BT 2.0+EDR dongle I got back in 2009, the modern BT5 version of the dongle is this. I don't know if OPL supports BT5 adapters or not. Edit:also here is BT4 version