Thank you xraydoc! Very useful information.
First I'll investigate the first option you mention (and finding out if I then have enough ports at all); just an adapter. I presume that such adapters come in different qualities?
That Thunderbolt 4 dock is also a serious option. No Thunderbolt 5 yet (?)...maybe from OWC recently..I' ll find out. The Mac Studio Display is 5k..and my Eizo is 2560 x 1440p. So that should work. And then maybe also suitable for my 2 printers ("regular " USB). If that's the case, I'll probably buy an OWC dock.
Does such a dock always work?
As you know, the Mac Mini M4 Pro has 3 Thunderbolt 5 ports on the back and 2 USB-C ports on the front.