If you really want, you can use almost any cloud-based solution that allows you to sync folders, with some caveats.

I use Obsidian with my Google Drive; it took me about 5 minutes to set up, and it works like a charm now. However, you need to set it up on every device you plan on using for synchronization. Also, you cannot work on the same document on two devices simultaneously. Otherwise, it works as you’d expect.

It’s definitely messier than the Obsidian cloud, but for my needs, syncing it via Google Drive is more than enough.