If I'm honest I do think that it's perfectly reasonable for theatre to play around with this stuff and* mix up contemporary and historical information. That's theatre's job. I don't want to see this production particularly but maybe I will. Or at least read a biography of Joan.*
This is how I feel about it too Permanent, but something about this doesn't sit well with me. The announcement shoehorning in they/them pronouns as a definitive element of the production (and/or Joan's entire existence) just made me cringe. All well and good to look at things in a different way, but this just seems like performative, agenda-driven queerwashing, a virtue-signalling trend of little substance.
The production is certainly getting talked about more than it ever would otherwise.