I just tried just to see if something changed, and I get this message when selecting Other:

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Other Syncing Methods:

Obsidian officially supports two syncing methods: Obsidian Sync and iCloud.

However, because obsidian gives you control over your data there are other sync options you can use.

These options include third-party plugins and other tools which may require more advanced setup.

To use an alternative sync method, create a vault and follow the instructions provided by the plugin or third-party sync provider.

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I went ahead and created a vault specifically to test this out, but I wasn't able to find any way to open Google Drive from within the app.

To give some context, I use KeePassium with a KeePass vault stored in my Google Drive, and it works seamlessly, I can browse to the directory and select my database right from the file picker. Unfortunately, that same experience doesn't seem to be available in Obsidian.

I'm a Windows user for work and don't use iCloud for anything, so Google Drive is really my go-to. I've tried multiple times to make it work, but it doesn't appear to be an option. As I understand it, Google Drive isn't natively selectable from Obsidian's iOS menu, and this wouldn't be a trivial thing to add since Google Drive appears as a folder in the native iOS file browser, which is exactly how I use it with other apps like KeePassium.

I've submitted this as a request on GitHub several times, and even mentioned that I'd happily pay a one-time fee to unlock this functionality. I'm not a fan of subscriptions personally, but I do believe in supporting developers for their work.

That said, if there truly is a way to use Google Drive with Obsidian on iOS, I'd genuinely love to see a step-by-step guide, could you share one?