2 questions regarding the banner for to the breadcrumb.
1. Can I have a full banner image on my Woocommerce pages only (including pages of each taxonomy, product attributes etc.)?
2. Can I customize it (different picture for each product category and
custom text on each banner)?
I hope you are well today and thank you for your questions.
Currently the theme doesn’t provide this functionality so you have to develop custom code to achieve this.
Developing custom code for custom functionality is beyond the scope of support that we provide here. Please see https://themeforest.net/item/jevelin-multipurpose-premium-responsive-wordpress-theme/14728833/support
If you are not a developer then you can consider hiring a developer to develop it for you. You can hire a developer from any freelance site. Shufflehound recommends the developer https://www.upwork.com/freelancers/~011652ffec8865c6d5