Not entirely sure. Lots of discussion between cabin crew and GA's in the aisle about that very question. Discussion ended with "the captain says we're leaving in five minutes". Loaded a few standbys and the door closed.

It was a minor-drama flight anyway. After much hand-wringing, a family de-boarded (by their own choice) last minute after somebody's covid test suddenly came back inconclusive. That may or may not have been related to three police officers waiting on the arrival jetbridge (for no apparent reason, but not seeming to be expecting any sort of confrontation).