I've recently got a refurbished T480, running NetBSD -current and everything works very well (accelerated graphics, HDMI, HDMI via USB-C, audio, microphone, webcam, ethernet, wireless).
What it is recognized but I have not tested yet:
- Bluetooth
Suspend/resume currently doesn't work due:
Devices without power management support: pchtemp0
But I see a commit only few hours old by Riastadh that probably addresses that!