Just to let you know that I'm still working on your problem.
What we've established so far, is that your Delivery Optimisation Service (DoSvc) is not starting, and this appears to be an access issue.
However, so far when I've checked the various permissions related to that service, they appear to be identical to those on my WS2019 VM.
So at the moment I'm re-checking all that we've done so far, to see whether I've missed anything that may be pertinent. May take me some time, and no guarantee that I'll find anything, but I will get back to you, just don't know quite when that will be at this point.