So the last patch is out. And while it might be a bit cynical my experience with betas (when they were still a thing) and early access is to never expect more than what is shown or announced. So for now I assume that there won't be monks or dragonborn in BG3
on monks I won't be too sure. I had a bug where I could enter some dev modules (where the char generator was different). Look what i posted once. There was clearly a monk!