Wireless printer compatible with Netgear Nighthawk Mesh WiFi 6 System

> [...] Now my old HP wireless printer [...]

   Not a very detailed description of that device.

> [...] will not connect dispite everything I have tried. [...]

   "will not" is not a useful problem description.  It does not say what
you did.  It does not say what happened when you did it.  As usual,
showing actual actions (commands) with their actual results (error
messages, LED indicators, ...) can be more helpful than vague
descriptions or interpretations.

   How many people on this planet, would you say, have any idea what
"everything I have tried" actually entails?  Or what "will not connect"
means to you?

   Everything other than your printer works as expected?

   Is the problem getting the printer to communicate with the router, or
getting some (unspecified) computer/device to communicate with the
printer, or what, exactly?

> [...] Is there a wireless printer out there that I can easily install
> & continually work with this WiFi system?

   Not knowing why your (unspecified) "my old HP wireless printer" is
not working, I wouldn't hazard a guess.  I wouldn't bet that any other
printer would do any better.

   You might start at hp.com, get the instructions for your printer,
resd them, and follow them.