Practically not really needed for a person going out of their way to setup syncthing, you can just sync the underlying folder, I do this with logseq, their syncing subscription is paid, I just sync the underlying logseq graph and markdown syntax. It's seamless and rarely disturbs me, works well in background, although android seemingly doesn't respect my background preferences, and clears it out of my ram when I inevitably hit the clear button, but that's soluble by simply rebooting once in a while.