On iOS/iPadOS, the only folder Obsidian can access on iCloud Drive is the dedicated Obsidian iCloud Drive folder 
ā¦ (because thereās some sandboxing/restrictions involved on iOS/iPadOS (only))
It should look like this:
If that very specific Obsidian folder doesnāt exist yet in iCloud Drive, you can trigger its creation by creating a new vault on iOS/iPadOS and tell Obsidian to store the new vault on iCloud .
The workaround, if you want to use iCloud to sync your vault across Mac & iPhone/iPad, would be to move your existing vault (currently located āanywhereā in iCloud, if I understand correctly ) in the Obsidian iCloud Drive folderā¦
(There could a little bit more info here)
Any vault located in the dedicated Obsidian iCloud Drive will be sync across Mac, iPhone & iPad ā¦