Apple - MacMini 2018 is slow to wake after sleep
The problem was on MM's hdmi port, i switched to usb-c > DP and no more issues. Though it takes like 5 seconds to show up the picture, but it's acceptable, it's not 60 seconds.
I have no idea if Apple gonna fix this soon. But i have no purpose to use HDMI at all.
I have a Mac Mini 2018 I bought early 2020. Initially I had the slow wake problem but when I upgraded from a generic wired mouse to Bluetooth Apple magic mouse that problem went away and has not returned. I just tap the keyboard and within a few seconds it's back.