I use Joplin over 3 years now, however Android app over 2.5 version is not possible sync over Syncthing. So I cannot update since 2.5 version which is not great

I use Joplin over 3 years now, however Android app over 2.5 version is not possible sync over Syncthing. So I cannot update since 2.5 version which is not great, not terrible.