In addition, quite a lot of people didn't know about Larian until BG3.

It's the whole point of them going for the IP in the first place. They were rather niche because only CRPG fans really took note.

BG3 was all about taking a popular IP to bring in the large crowd of BG/D&D fans.

That BG3 was such a success it even got mainstream attention was icing on the cake for them.

Hence this new Divinity being aimed at being independent of prior Divinity titles, because of the newfound large playerbase that only found out about the studio from BG3.