iOS / iPadOS: open vaults from Files appa

Use case or problem

I have vaults stored in external storage providers such as OneDrive and Working Copy, which I would like to access on iOS / iPadOS. Unfortunately my only options are the default (app) folder in iCloud Drive, and Obsidian Sync.

Proposed solution

Much like on the desktop version of Obsidian, I’d like the ability to open a folder (from the Files app) as a vault on iOS / iPadOS.

Related feature requests (optional)