Hey All.
I wanted to let you know that it's most likely an issue with the cable. If you're using an older Mac Thunderbolt cable, it may not be Thunderbolt 3 compatible. I had the same situation with my Mac Mini M2 to my Quantum 2626. I used my Thunderbolt cable that I use to charge my MacBook Pro without success and I felt that I should see if a different cable would work. Unfortunately, I didn't have another cable that was long enough to reach the Quantum in my studio setup.
This is what I ordered from Amazon and what fixed the issue:
https://a.co/d/ezjb3UY
It doesn't have to be this specific cable... any Thunderbolt 3 cable should work.
Hope that this helps you all! Let me know if it does.
Best,
Jon