I never heard the term mentioned in regards to the Church.
It’s apparently not called “Candlemass” in Eastern Orthodoxy, but the blessing of candles is conected with the Meeting of our Lord (or at least we did it in our OCA parish last Sunday, in lieu of doing it on Sat. Feb. 2, the true day of the feast).
Is that not true?
Also, a Western Rite Orthodox parish that I know from the Internet celebrated Candlemass, and called it by that name. “Mass” is a Western Christian term.