I have no evidence for this, but I'm sure registration for URL schemes, as well as registration for processing files, etc. - This is a time setting procedure.
However, in my experience, providing updates through the application store and updating the application launches this installation procedure (since the updated application can register new URL patterns). Therefore, if you constantly update your applications, providing frequent updates, iOS should prefer this (and from this point of view, the unofficial rule used by the last handler is used).
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