I have a question about dark druids. The FR wiki doesn't have much information about them, other than what was already in in the Baldur's Gate games, which makes me assume they are an invention of BioWare. Is it true?

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."