Adding multiple feature-option-variants in the same time

I need to to add multiple feature options variants in the same time because product import features doesn’t create them automatically when found on xml file. So, instead of adding one feature option variant at the time, I need to add i.e. 50 variants at the same time. I tried to export database cscart_product_feature_variant_descriptions in csv format , add it the need it options and then import it back but they are missing from admin- products-feature-‘myoption’-variants

There is a built-in mechanism for importing features (Administration → Import data → Features). Have you tried using it?

Thanks, I will try now!