I just found a PR when a dev used useMemo instead of useCallback to memoize a function. It triggered my curiosity.

Are these two functions inside a React component/hook identical?

let b = 1;

const memoizedFunction = useMemo(
  () => (a) => (a + b),
  [b]
);

const memoizedFunction2 = useCallback(
  (a) => (a + b),
  [b]
);

At first glance, that appears to achieve the same goal.