I use SyncThing with obsidian on Android, window and linux and can confirm. Setting it up is straight forward my only issue is that it doesn’t merge files. If a file is edited on two devices that can’t be synced (one is offline while the other one edits the file for example) it turns the older edit of the file into a copy and takes the newer version for both devices. Depending on your use case it could not be an issue for you at all though.