I don't believe the 2020 models to be significantly less reliable than any other model year. They've simply been around longer, with more miles, wear and tear, factors in. Things break as a product ages and more users are talking about a vehicle that's been on the road longer. That's the way it goes on forums.
The truth is that some of the problems that have existed on the Explorer ST's from the get-go are still here. That said, there wasn't much talk about struts, strut hats/bearings being an issue on the early models, given that, I'd assume other problems can creep in.