At present, the Classic Cart is the only supported option for showcasing the thumbnail featuring the personalized design in the WooCommerce cart. Regrettably, the new Block Cart is not currently supported.
In Gutenberg editor:
FPD Main Settings
In the settings you also need to enable "Customized Product Thumbnail" option.
For displaying the custom design thumbnail in cart:
For displaying the custom design thumbnail in order details ( e.g. New Order Mail, My Account etc.) :
