Hi
I have a 2022 manual Plus Four. When I took delivery (before the brake safety recall) I had numerous instance of the yellow overseer light. The dealer did some updates or something - all software related, that improved it. Since then I seem to only get the red overseer light, However, aside from the fact that I cannot see the digital speed, I ignore it. It always resets itself after the car has been switched off for a while.
The last time it occured I was on my way to an MOT at the Morgan dealer. As I handed it over I mentioned it to the mechanic and said to him that I just ignore it these days. He smiled and nodded with a wry smile, which I took to mean, that's the right thing to do.
If there was an issue with ignoring it - ON A MANUAL CAR - then without a doubt he would have told me.
That's my experience - hope it helps to put your mind at rest. Oh, and I usually only get it when I'm driving in a very "spirited" manner