Hello 

1. We'll add the possibility to get from Shopify and save localy product image(s) in the next version. https://github.com/unaio/una/issues/1833

2. We are contacting with Shopify support to get answer on this question. They updated their integration API which forced us to reintegrate. New integration requires to use so called Handle which is available in "Search engine listing preview" section on edit product page. But for some unknown reason this section isn't available when you are using a Shopify's Lite plan.