Can I use display from iMac (Retina 5K, 27-inch, 2017) with new mac mini m2?
Will this work?
iMac, OS X 10.10
Nope! A new Mac mini does not support using an iMac as a display in Target Display Mode.
carefully read > Use your iMac as a display with target display mode - Apple Support
If you get or have a new Mac mini, then you will need to use an external aftermarket display or an Apple display.