Citra core for RetroArch?

Apologies if this has been asked before. Does a Citra core exist for RetroArch?
I’ve heard RetroArch already has a 3DS core available, not sure what it’s based on.
I don’t think it’s Citra, but in any case I think Citra would perform better.
Would love to try it on my new Firestick with Zelda - A Link Between Worlds.
I like how Citra has been developed and continues to be improved upon. Much respect to the devs.