Did you ever find an answer to this? I am stumped as well and find this ludicrous that it isn't built-in and easy to do.

Thank you for responding with such detailed info. I did the implementation myself so will see if I can make this work.

Thank you for the reply! The related file I found for Kilamanjaro was _product-details-information.scss Unfortunately, I could not find similar code but did manage to find this: .product-details-information-tab-content-panel { @extend .tab-content-panel; } This led me to the BaseSassStyles module and under molecules, a…