I do know that the autoplay handlers in the registry have changed, but I am definitely not certain that this is what is causing the problem. However, I think this is a likely source of the issue since the issue has arisen in coincidence (broadly) with the 20h2 win10 release. I've also enabled both itunes helper and itunes mobile device helper in task manager startup functions, but again with no results. I can't find a way to isolate whether the problem is related to itunes or to win10, so i'm looking for a solution in both places. I'm hoping I get a nibble on this from someone else in the community who might be able to give us a lead.
Also, in some recent version of itunes, the toggle used to be to automatically launch itunes. At some point it was changed to automatically sync.
Don't know😒