@chielojawood:
I'm not sure how much time I'd have or how long it would be, but I have a few short ideas on an A/U universe where Diana has survived the post-crash negligence and is still alive today and living in Switzerland.
Harry and Meghan have a home in Switzerland close to her.
With Diana alive, people wouldn't be trashing Meghan so much.
Diana would still have lingering scars and a limp from her accident, but would have mostly healed nicely.
Diana would still be a humanitarian and would be a roving world ambassador today.
She'd also see her grandchildren every so often.
That would be my take on if she were still alive today.