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Karmic Dice - yes or no?
(bg3.wiki)
Baldur’s Gate 3 is a story-rich, party-based RPG set in the universe of Dungeons & Dragons, where your choices shape a tale of fellowship and betrayal, survival and sacrifice, and the lure of absolute power. (Website)
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I assume it is possible to switch it on of off anytime during the campaign.
It's an overall game setting, so yes. Thankfully you don't have to worry about making the choice before starting