Here's why:
* Subject-Verb Agreement: The subject of the sentence is "he," which is singular. The verb should agree, but "wants to" is correct.
* Object: The phrase "is it here" is grammatically incorrect. It should be reworded.
Here are some possible ways to correct the sentence:
* "What he wants to do is [action]" (e.g., "What he wants to do is eat.")
* "Is what he wants here?" (e.g., "Is what he wants to eat here?")
* "Does he want it here?" (e.g., "Does he want the pizza here?")
Please provide more context about what the speaker is trying to say, and I can help you create a grammatically correct sentence.