It is not only LocalBitcoins, there are some P2P platforms closed their services too like Paxful, 2 months after LocalBitcoins.
Paxful is shutting downYou must have missed that paxful came back! try accessing the website again
Most members are not aware of their resuming services and actual reason for centralized p2p exchanges to shut their operation is due to the implementation of p2p trades in most of the exchanges itself for example Binance p2p where people choose to trade with other users so users not interested to get KYCed on multiple platforms when all things can be done at one place.