Suggestions for Linux-friendly BLE dongle?

It'd be great if you could lsusb and post up the USB IDs?

the reddit thread has it, I think mine is that 0bda:a729 Realtek Semiconductor Corp. Bluetooth 5.3 Radio mentioned there, will check later EDIT: yes, that's it

I'm still doing all my main work using a Broadcom BCM20702A0 based BT 4.2 module and it's been pretty reliable for me.

the 5.3 one I have is good because it can also do coded phy - long range of 52840, however linux/bluez support for it is not great overall, but at least scanning for extended advertising over coded phy works