I'm pretty sure they said all companions will be rommanceable by all races and genders. And jokes aside, I think in this case it's a very poor decision unless they will manage to make it some sort of humourous romance.

Larian's Biggest Oversight, what to do about it, and My personal review of BG3 EA
"74.85% of you stood with the Tieflings, and 25.15% of you sided with Minthara. Good outweighs evil, it seems."