많지는

not many, not much

→ 많다
많 many, much, a lot of + 지 Clause-ending marker for assertion or confirmation + 는 Topic marker
adjective Rare #25,831
not many, not much Used in the pattern 많지는 않다, meaning “not be many/much”; 는 adds contrast or emphasis.
KO: 시간이 많지는 않아요.
EN: I don't have much time.
Forms of 많다

그리 많지는 않았습니다

There weren't very many.

— 마션 (2015)