Even after Qe6 it's a theoretical draw. The link to the online tablebase shared by @SecretAgentMan says Qe6 loses with DTZ 63, meaning White can force a win, but it will take 63 moves before a pawn moves (or a piece is captured). When played perfectly, Nepomniachtchi would still be able to claim a draw based on the 50-move rule.
There is no question. It is a theoretical draw (see tablebase).
Obviously to mere mortals, playing on may hold practical chances for one side. GM Nakamura repeatedly said that Game 6 of WCC positions were extremely difficult to play for Black.
In this position, Black only has two moves that draw: ...Qb1 and ...Qc2 (without considering the 50 move rule).