Sawir Variation Gallery Tools for WooCommerce adds an "Additional variation images" field to each variation in the WooCommerce product editor.
When a customer selects a variation on the product page, the saved images for that variation are added to the WooCommerce product gallery.
Store managers can also bulk export and import additional variation images from WooCommerce > Variation Images. The CSV export includes each variation's ID, SKU, attributes, additional image IDs, and image URLs. The CSV import can replace or append images for imported rows.
This plugin works with Sawir Product Image Zoom for WooCommerce:
https://wordpress.org/plugins/sawir-product-image-zoom-for-woocommerce/
The variation images are added as standard WooCommerce gallery images, so Sawir Product Image Zoom for WooCommerce can include them in its lightbox and zoom experience.
More from Sawir Studio:
Sawir Restock Notifier for WooCommerce helps customers request back-in-stock email alerts for out-of-stock products:
https://wordpress.org/plugins/sawir-restock-notifier-for-woocommerce/