To be fair...under the same conditions windows and even Linux a la Nvidia gracefully handles monitor assignment for matching serials so I think it's a bit disingenuous to say this is all on the monitor manufacturer...though I agree ultimately they are the primary party at fault.

Source: have this exact scenario and on windows/Linux Nvidia drivers it works and on Mac it flips everytime I come back from sleep. Same brand batch and serial, cables, ports, etc.

And I have an m1 pro with a simple HDMI to usbc and an HDMI direct so no hub/bus assignment funny stuff either it's directly plugged into dedicated ports.