Thats still not what... Indie means.
The thing between the names you just said. Larian,Studio FOW.... the comparison... lol. Larian paid its production by... games they make. Divinity Original Sin, Sin II. Divinity Original Sin development was about 4,5 Million, some kickstarter, lot personal debt the devs took. No numbers how many sold, but Sin II sold about 7,5 Mio copies on Steam, Steam says on their plattform it made about 365 Million dollar. (No numbers for Xbox or Playstation are given, also no Epic Game Store or others) - So we can say they made... alot, with their Games.
Baldurs Gate 3 Production was about 100 Million...so. No, they took no money of their playerbase in order to develop BG3. They just early accessed it, in order to make a good game. Not because of money. Not like studios like... this one.