Localbitcoins lost their trading volume because they used to be a p2p BTC exchange that later began to ask for KYC from their customers, their users were people who wanted to trade only p2p, so obviously trading volume was going to drop, as their customers moved to other BTC p2p exchanges.
But there are still other P2P platforms from exchanges like Binance, KuCoin, OKX, ByBit, etc., that we can still use as of the moment.
Binance, OKX and other centralized exchanges are not true p2p exchanges because you do not trade directly with the other trading party.
When a service was created to give privacy and ends up having to remove it, this was the biggest mistake of localbitcoin. In the wake of this closure, others will benefit such as Bisq, Robosats and even Peach.