Check out example codes for "variables in useQuery apollo". It will help you in understanding the concepts better.

Code Example 1

const query = gql`
  query User($okta: String) {
    User(okta: $okta){
      id
    }
  }
`;

client.query({
  query: query,
  variables: {
    okta: 'some string'
  }
})

Code Example 2

const GET_DOG_PHOTO = gql`
  query Dog($breed: String!) {
    dog(breed: $breed) {
      id
      displayImage
    }
  }
`;

function DogPhoto({ breed }) {
  const { loading, error, data } = useQuery(GET_DOG_PHOTO, {
    variables: { breed },
  });

  if (loading) return null;
  if (error) return `Error! ${error}`;

  return (
    <img src={data.dog.displayImage} style={{ height: 100, width: 100 }} />
  );
}

Code Example 3

export default graphql(QueryTodos, {
  options: (props) => ({ variables: { userId: props.userId } })
})( Home );

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