Monitors not Recognized on Mac mini Boot Up

[bluerediceye]

I had the exact same issue as yours. My mac mini m1 crashed for some reason which I think is related to the dock and displaylink driver. After the machine started up, all monitors connected via the dock were not recognised and I had to unplug and plug dock power lead.
The dock is connected to mac mini m1 via USB-C, because I want to maximise the data transfer speed but unfortunately it caused problems. A workaround I found that worked for me is to use mac mini m1 USB-A port. Since that I haven't experienced any problem such as crash reboot and connection issues.