So I've literally created an account for this site to tell you this. Your post came up on Google when I did a search.
I've been trying to find this out for a while. The only evidence I've seen that supports it is this...
https://gear.bethesda.net/products/doom-tac-assault-commander-pro-m2
It's an official playstation/bathesda Doom Eternal themed mouse and keyboard, with PS4 buttons. The description says that it works for games that support M&k and will emulate for those that don't.
It would seem reeeeeeally weird to release this product only for it to emulate for Doom Eternal. Especially when what I've heard about mouse emulation isn't great.
So I am hopeful. The new Cod has support, Sims 4, fortnite. So I don't see why they wouldn't at this point.
Fingers crossed.
Edit... Lol WOW I should have read your post better. You've already seen the product. We'll see I guess.