We have a wireless Brother laser MFP from 2-3 years ago that just works. I needed to scan something for the first time a few weeks ago and started to go down to rabbit hole of the official driver package but then I decided to give “scanimage” a try and it just found the scanner.

I’m not sure if I have them and don’t remember them or just don’t have them. Like you, I may get a little something during short naps but next to nothing during longer sleep.

Related to this, are you able to picture images in your head while awake? There’s a phenomenon called aphantasia that I’ve participated in a couple studies on. I’m somewhere around a 4 or 5 on the picture in the wiki. I recall at least one of the studies exploring the correlation between aphantasia and dreaming.