Currently, when I select a piece of text and linkify it with Ctrl+K or Insert > Hyperlink on the menu, the default link target is the text that's in the clipboard. This is not so bad for arbitrary text, but - when the text selected for linkification is itself a URL (e.g. "https://www.libreoffice.org"), or URL-like (e.g. "www.libreoffice.org") , I believe the better default suggestion would be either the link text itself, or perhaps the "completed" link text, with the https:// or other appropriate prefix.

I would specifically like to see this for email addresses, which typically don't get auto-linkified. So, if I select "foo@bar.com" and linkify that, the suggested URL should be "mailto:foo@bar.com"