Yes, that happens to be true now, but while I’m having some trouble coming up with the right search terms to determine exactly when the 良 radical was added (or named), it’s nevertheless true that prior to six years ago the radical currently named “root” was named “good”. As further evidence in favour when you search WaniKani for “good”, both radicals turn up.
(Unfortinately, 良 doesn’t show up in the Content Updates section of the forum prior to 2022, where the note on it is “Updated the meaning mnemonic”. That said, there was also an update back in 2021 which listed “added “good” to block list” [of the “root” radical], but considering it’s not blocked now, I guess it was removed again.)