Well. Further to my previous post where all hope seemed to have gone out of the window I finally made progress today, but not the way I set out to.
First off, I pulled a Raspberry Pi 4 from another project and sat the CaribouLite HAT on it.
Next was a fresh installation of DragonOS. But this time it did open the ssh port – I’ve no idea why it did not before and note I am being unscientific here as I changed the Pi, but I am not going backwards.