We have a winner! After also adding to the server.xml it is now super fast. I was so quick I had to double check the URL to make sure I had not accidently opened the local version at my side. It’s faster than my old CF2016 (after reinstall to fix speed issues) and faster than CF2023.
I’ll change these back one by one to see which one makes the difference or if it’s just one and report back shortly.
BIG THANKS to @TonyMonast and @markdrew for guiding me through this!