@shonatiger Have you tried the Remotely Save plugin with Dropbox? Here are a few syncing options besides #Obsidian Sync (and iCloud, which doesn’t work with Android or Linux and isn’t recommended for Windows), though I believe there are a few more for Android:
• Self-hosted LiveSync plugin
• Remotely Save plugin and various cloud services, including Amazon S3 or S3-compatible, Dropbox, OneDrive for personal, and Webdav