Larian Studios Forums Baldur's Gate III Baldur's Gate III - Mega-threads and Guides Differences and Similarities between BG3 and D&D5e core ruleset.

Pillars of Eternity II: Deadfire, specifically in turn-based mode, is very similar to DnD rules.
Granted, it is not "true" DnD, it may not even officially use licensed DnD rules, but it is closer to what that list above shows for "true DnD" than BG3 .

But as I said, I'm not veteran DnD player and whether Pillars of Eternity are true DnD or just DnD-like is not changing my above comments about BG3.