component.vue

<template>
  <component-001
    v-slot="{ prop1, prop2 }"
  >
    <slot name="slot1" :slot-prop-1="prop1" />
    <slot name="slot2" :slot-prop-2="prop2" />
  </component-001>
</template>

<script>
export default {
  mounted() {
    // How to get prop1, prop2 of component-001 here?
  }
}
</script>