Make 3rd party apps direct sharing targets in native clients

How to use GitHub

• Please use the 👍 reaction to show that you are interested into the same feature.
• Please don't comment if you have no relevant information to add. It's just extra noise for everyone subscribed to this issue.
• Subscribe to receive notifications on status change and new comments.

Is your feature request related to a problem? Please describe.
Since Nextcloud is a great platform to develop for, there are multiple solutions for the same issue.
Yet, when creating a sharing link via one of the 1st party clients, the target is always a first party app.

Example: If I want to share a photo or video straight from a client app, like iOS, I wish to create a link which opens the share in memories, instead of the first party Photos. Currently, this is not possible.

Describe the solution you'd like
Offer an admin setting menu which allows defining which app is targeted for what kind of share. This might include defining URI stubs and mime types.

Describe alternatives you've considered

1. Using reverse proxy stream modification to rewrite any share URI tld/s/ to include the stub for my target app. Downside: This breaks sharing of file types not supported by the target app
2. Manually adjusting the Link I send out. This is cumbersome and not workable on mobile.

The issue identifies no files, tests, or entry points. First determine how the server's sharing links and native clients currently select targets, then assess where an administrator mapping for URI stubs and MIME types belongs. Done means supported share types can open the configured app while unsupported file sharing continues to work.