Hello,

This is a Product category widget https://ibb.co/FbY24Vp There is no option to add icons there, this is Woocommerce functionality and Woocommerce does not provide such an option.

This is the WoodMart option and you can add icons as per the instruction provided below: https://ibb.co/FbY24Vp

If you have any questions please feel free to contact us.

Best Regards