How can I split product variants in my dropshipping business?

[mamou]

i'm starting a dropshiping business

some product in my store has 100 product variants 

oberlo app has a feature to split product  

But most of my store products are from ALIBABA droshiping app and it doesn't have the feature to split products.

 Can I import those products from my store's CSV file? Then split them and import them back into my store? or do you know any app who can do the job for me without compromising the connection with the dropshiping app? 

Thank you. Regards.