Yep, I used to sync my Obsidian vault with Syncthing but I had some trouble with it once where stuff wasn't properly synced and led to conflicts so I switched to paying for Obsidian Sync and have been very happy with it. I was especially happy to see that now offer a cheaper tier that has enough storage if you only sync text files.
And I always thought my Linux VMs were just not working correctly when I tried to use that feature. I'm surprised that Linux doesn't have it. I use it constantly on Windows.
For reference I take my estradiol through patches and take cypro as anti androgen.