First impressions from Consumer Reports.
They rented a Mach-E Premium 4x for this first review.
They indicate they'll buy one soon and a more thorough review will come later.
It appears there will be 3rd party options available by or shortly after launch. Here's a link to a sun shade for the panoramic glass roof:
Scroll down and you'll also see floor liners and cargo liner.
Houston Auto Show has a Star-White Mach-E Premium.
You can walk up, touch it, and look inside through the windows -- but all the doors, liftgate and frunk are locked. The 2 exhibitors showing it said they cannot get in themselves. It is a pre-production unit, so they are not allowing anyone...
EcoHitch web site now has an option for 2021 Ford Mach-E.
So it appears we shouldn't be concerned about availability of aftermarket hitch options.