In the Azkaban arc, they were able to Time Turn away from Azkaban, do some preparation, then arrive after being informed of the breakout. I don’t think this would work to prevent Dumbledore from using a Time Turner to be in two places at once.
In the Azkaban arc, they were able to Time Turn away from Azkaban, do some preparation, then arrive after being informed of the breakout. I don’t think this would work to prevent Dumbledore from using a Time Turner to be in two places at once.