There are plenty of theories, collected on the FRB theory wiki (https://frbtheorycat.org/index.php/Main_Page https://frbtheorycat.org/index.php/Main_Page). On

There are plenty of theories, collected on the FRB theory wiki (https://frbtheorycat.org/index.php/Main_Page https://frbtheorycat.org/index.php/Main_Page). On that wiki you can sort them alphabetically, which one professional in the field has termed "the most sensible way of [ranking them]", but other than that there's no clear consensus. It's not really surprising: until the Chime results there's only been a single FRB that has recurred, so mostly the theorists have had a small collection of strange noises with no context that they should try to explain. Given the breezy restrictions imposed by "no context", they've taken some liberties.