This is from a Kotaku article that was published today:

"Larian has been working on Baldur’s Gate 3 for six years and the game features 11 races, with their own original appearances and traits. For now, the studio has “no plans whatsoever” to add any new races to the RPG. So if you were hoping to play as some of the other Dungeons & Dragons races like a Giff or a Bugbear, temper your expectations. But the races that are in the character creator all seem to have a lot of options, even among the presets."

Link to the article.