iOS file tags API?

With the introduction of the Files app, it seems like file tags are finally supported on iOS. But I've been searching and I can't seem to find an API for it. NSURL's getResourceValue:forKey:error: doesn't accept NSURLTagNamesKey, stating that it's unavailable on iOS. Is there another way?

Has there been any update on this?

I've been wondering for a long time as well. Why is Apple not commenting on this?

iOS file tags API?
 
 
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