Is there a way to create a social link that is not on the list? If not I would think that an “other” option where you could define a name and icon, could be helpful. In particular, I’m wanting to provide a link to a Letterboxd profile, but obviously I could see others wanting to share links to other services as well.
It sounds like Add new entries to the "Social Links" Dashboard page might be what you are looking for.
Hopefully this gets you going the right direction!