Changed the hot end? Like just the brass nozzle tip? Or the what?
Either way if pla isn’t printing below 220 I’d start with a pid autotune. This will let you see if the hot end is actually doing what it should.
This site:
https://teachingtechyt.github.io/calibration.html
Has all the steps for tuning a printer, pid and e steps are listed. It’s worked well for me on my old Ender3 Bowden drives and many of my newer direct drive ones.
What printer do you have?
https://museumoftheredriver.org/acro/