OK so I have done more research on this. I am on crutches at present so cannot visit the store!
1) There are loads of people on the web and in this community that have had huge issues with Sequoia and M1 Macpros. Resolution has often not been possible or they have gone back to windows machines.
2) I found a YT on the general issue and nothing really helped me.
3) I note that when I use the usbC on one of the three inputs it does not work at all. With the others I am NOT now getting a power issue. The disc is seen as before and I ran a diagnostics check which it passed.
HOWEVER
1) there is not DVD icon on the desktop.
2) It is not listed on the finder login at the bottom left….very odd as it does come up in that screen I took the picture of above still. It shows the disc has largely not been filled.
My gut tells me that it might need a powered assisted usb connection.
Can anyone think of anything else please?
I checked and the DVD writer /vplayer works perfectly on my MacAir and I am going to have to use it or my old trusty DELL to burn to disc….sigh…..