A:AnswerYes, this printer will work with macOS Big Sur. You should be able to just add the printer to your Mac Mini. If you need the drivers, you can visit https://123.hp.com/setup
A:AnswerPage 5 of the User Guide under "Button Combinations" shows you which buttons to press to print a page out with the WPS pin information: http://h10032.www1.hp.com/ctg/Manual/c06584213 If you need further assistance, you can go to https://support.hp.com
A:AnswerAs long as the Dell is less than about 10 years old absolutely. If the computer is older than that, I'd need more information about the computer.
A:AnswerYes, this printer is compatible with Catalina 10.15 for printing and scanning. It does work with Google Home. Here is how to print with Google Home: https://support.hp.com/us-en/document/c05497637