Delta Chat on Nostr: even if there is a https://i.delta.chat link delta chat apps are registered to open ...

even if there is a https://i.delta.chat link delta chat apps are registered to open it locally without any network request .... Unless delta chat is not installed. Even then no personal information is relayed because it is right of the "#" in the url. We would expect matrix.to links to behave similarly but haven't checked in detail.