How to use VueX 3.6 mapActions in vue 2.7 script setup

we're using VueX 3.6 with Vue 2.7. The project is old We can't go to Vue3. For new components, we're trying to use script/setup for new components. How to use VueX mapper functions in this situation? Specially mapActions.

Versions: vue: 2.7.16 vuex: 3.6.2

Edit: (add details) Following is what I did

<script setup>
import { mapActions } from 'vuex';

const actions = mapActions({
  fetchCoupons: 'coupon/fetchCoupons',
});

// later ...

onMounted(() => {
  (async ()=> {
    await actions.fetchCoupons()
  })()
});
</script>

Got following error

Cannot read properties of undefined (reading 'dispatch')

This works fine in setup() or options api.

Following is the action which is being called

fetchCoupons: ({ dispatch }) => {
  dispatch('handleAsyncAction', {
    handler: async () => {
      const res = await getAllCoupons();
      dispatch('setData', res.data.data);
    }
  });
}