Seems I am having the same issue as the others have posted. I outlined my problem recently in a thread before finding this article.
https://displaylink.org/forum/showthread.php?t=68684
Had a working set-up of 3 monitors an on Mac pro M1 mac with D6000, moved to Mac air M2 and now the HDMI port is not detected when both DisplayPorts connected.
This
Youtube video evidences that this desired set up is achievable with the Air M2, so it suggests there is an issue with DisplayLink and D6000.
This seems to be a very common issue for people. We'd appreciate a solution as more and more people upgrade their machines this will be come a wider problem for you.
Thanks