Many thanks for all your replies.
I've run a design company using Macs since 1992 and have never had issues with printing PDFs within Acrobat (latest v.2023.006.20360). Only when I upgraded to macOS Sonoma 14.1 did the issue start. My colleagues have also upgraded to Sonoma but are able to print PDFs within Acrobat. I can print PDFs within Preview.
I reset Acrobat preferences and also uninstalled and reinstalled Acrobat, but no progress. I'm not sure it's actually a Sonoma or Acrobat issue, but maybe something very small on my Mac that is causing the issue, even a rogue or ancient file somewhere.
Any further ideas please? Any help much appreciated.