Hi,
Provided there is evidence the over hanging tree branch damaged the vehicles on the common area of the property.
Take images of the tree, branch damage and include a statement claim along with quote for repair damage .
Those vehicles which are insured leave that issue with them but provide them with information about the event
Those that are not, I would suggest the seek legal advise & submit a civil calm to the neighbour.
It is important to act on these matter asap.
Good Luck
Digby