I use SyncThing to monitor and sync my Logseq folder. It’s fast, encrypted, cross-platform, and peer-to-peer (doesn’t need a server).
It can use O/S filesystem hooks and sync nearly instantly on file write and detects change collisions. It has an intelligent file deletion queue.
About the only thing i could imagine being better would be real-time live multiuser Google Docs-like editing or a server that natively understands Logseq database transactions.
Dave