Mac mini 2023: What Version HDMI and DisplayPort is used?

The Mac mini can use most any display, with the right connection.

see > Connect a display to Mac mini - Apple Support

If you are having an issues with a display or connection to that display?

Then please tell us the brand and model of the display.

Apple doesn’t specify, use the spec to figure out which M2 you need for your monitor(s) Mac mini - Technical Specifications - Apple