It should be paid for by the public maintenance fund.

This kind of public part of the house, equipment, facilities and ancillary facilities, etc., shall be paid for by the public maintenance fund that can be used by more than two-thirds of all owners.

The shortfall will be paid by all owners after apportionment based on the property area.

Generally speaking, minor issues such as repairing a community doorbell or something may be included in the budget for property management fees, so they are covered. But as you mentioned, theoretically, they are not included in property management fees.