Larian is an unusual case. It's indie but it's huge. They aren't funded by or marketing through a bigger publishing company so IMO that's still indie. But they're hundreds of people so not really small, and BG3 can by all means be considered a AAA game because the difference in quality and scale is indistinguishable from AAA published games.
Wish more people realized this, and realized it's a bipartisan practice too.