Sync Notes using Obsidian

[Shadow08]

I use Obsidian for my notes taking apps and was wondering if anyone has any application recommendations for syncing notes across platforms. Ideally, I would have a folder defined that stores all my notes that I am able to take on my desktop, laptop, or phone and they would all sync up at least when I get back onto the LAN. With Synology, there was a sync client that worked really well but I'm not sure what the options are that support cross platform with HexOS/TrueNas.