A number of users on Reddit (including myself) have found that the process to setup Obsidian Sync on the mobile app is unintuitive. Here is the Reddit thread: https://www.reddit.com/r/ObsidianMD/comments/tcvt84/how_to_set_up_obsidian_sync_after_installing_the/
At minimum these steps should be mentioned in a tutorial on the mobile app:
- Create a new vault on your phone (its unintuitive that you need to create a new vault before you can copy down your vault in Obsidian Sync)
- Open the vault
- Go to settings
- Go to Core Plug-ins
- Enable Sync plugin (something should direct you to enabling the Sync plugin)
- Now you will be able to enter your credentials and choose the vault you wish to sync.
You need to know that you need to create a new vault and that you need to setup the Sync plugin.
Andriod 12 on a Pixel 5a phone