What does 인가요 mean?

what does 인가요 mean?

Here’s the pattern for this one: Korean Grammatical Forms

인가요 (인가? Is the plain form, adding 요 makes it respectful) is one of interogative ending forms, so 피터인가요 translates to “Is It Peter?” or “Are you Peter?” depending on the context.

이것이 무엇인가요? What is this? ~인가요? is one of the way to make questions.