Running a Function Directly in Rx Without React Hook

// we have a BookingStore layer

const loadMore$ = myRuntime.fn(() => BookingStore.loadMore())

const MyPage = () =>
  const loadMore = useRxSet(loadMore$)

  return (
    <button onClick={
      () => loadMore()
      // instead, can I trigger BookingStore.loadMore() directly here?
    }>...</button>
  )