Recently I put an ASUS ProArt X570 Creator in my main tower, and its onboard TB4 works great. Some basic functionality was there straight away after a clean Windows install and the gaps were filled in by installing Thunderbolt drivers from ASUS’ support site for the motherboard. It even supports G-Sync on the monitor through the hub-connected monitor, which was a real surprise (though refresh rate is limited to 120Hz without using a compressed color format due to the dock only supporting DisplayPort 1.2).
The biggest problem was actually getting the video card to recognize DisplayPort as a monitor connection during boot. For some reason EVGA 3000 series cards had a quirk where DP connected displays weren’t recognized in EFI and would only come online after booting the OS. Thankfully EVGA had a VBIOS update available that fixed this.
I’m looking forward to more TB4 docks being released. My current dock, the TS3+ has been quite reliable (especially after updating its firmware), but as noted its DP out is outdated.