You can share reviews between related products by following these steps :
- From Product menu, go to Product list.
- Click Edit product.
- Select the product you want to share reviews from on Group products to sync reviews field.
- Click Save.
If you want to share reviews in two-way sync, you need to configure each product menu. Learn more about one-way and two-way sync here.
You can check the product with shared reviews on Reviews menu.
- From Reviews menu, headover to Review management → Manage by product.
- Products which reviews are shared will be marked as Group product in the Status field.
- You can also filter Group product via Advanced search →Group product.