多くの人に

by many people

→ 多く
phrase Rare #24,666
by many people に marks the people performing an action in passive sentences; in other contexts, it can mean “to many people.”
JA: この映画は多くの人に知られています。
EN: This movie is known by many people.

彼は多くの人に同じ質問をした。

He asked many people the same question.

そんなことするべきではなかったと多くの人に言われるだろう。

Many people will probably tell me that I shouldn’t have done that.

多くの人に助けられています

Many people are helping me.

— Article 15 (2019)

推理小説は多くの人に愛されています。

Mystery novels are loved by many people.

その結果は多くの人にとって驚きだった。

The result came as a surprise to many people.

彼の顔は多くの人に知られている。

His face is familiar to many people.