Meaning of “come under sth” - Learner’s Dictionary

come under sth

phrasal verb with come uk us /kʌm/ verb (past tense came, past participle come)
come under attack/criticism/scrutiny, etc

to be controlled or dealt with by a particular authority:

When did Hawaii come under US control?

to be in a particular part of a book, list, etc:

Hairdressers come under 'beauty salons' in the Yellow Pages.

(Definition of “come under sth” from the Cambridge Learner’s Dictionary © Cambridge University Press)