Tube Mic pulled out from PS.. Damage?

[CDA]

No.

PSU's can run without loads all day long.

It's bad to put plate voltage on power triodes that have no load on them because they become unstable and build up massive inductive charges in the output iron.

But on that little thing, regardless if the tubes are in the actual mic or somewhere else.

Little triodes (Dual triodes 12AU7/12AX7) could give a rats rear end.

Most of them are cap decoupled anyway. So there is not going to be the risk of inductive reactance.

Sleep well. Your gear is fine.