How to test Redux Toolkit Query with Jest and React Testing Library: https://remarkablemark.medium.com/how-to-test-redux-toolkit-query-with-jest-and-react-testing-library-cc02c0528fcf

test-redux-toolkit-mutation.md

You would do the same thing except after renderHook():

await act(() => {
  const [myMutation] = result.current;
  myMutation(/* your args */);
});

expect(result.current[1]).toEqual({
  // your object
});

You can import act() from:

import { act } from '@testing-library/react-native';