The key broke in the lock. Can the property be repaired?

This is a public area, and this service is included in the property service fee. They need to repair it.

PS:

If they delay the maintenance, they can use this as evidence and refuse to pay this part of the service fee.

If the service of this property management company is poor and they refuse to repair it, you can call the property department of the Housing Authority to complain about them.