The following does NOT work well with a Mac Mini M1 16gb/1tb:
Dell U2713H (2014 vintage) HDMI to HDMI connection. 2560x1440 resolution.
Inconsistent and unreliable wake ups following sleep. Once it is awake and displaying something it works fine, but getting to that point is frustrating. Tried multiple HDMI cables, reset factory settings, ticket with Apple Support.
USB-C to displayport cable on order for a last-ditch attempt.
Monitor works fine with a $35 Raspberry Pi and other Windows laptop with HDMI. Shame on Apple.