Hi,
Did you mean these images? https://prnt.sc/MfUh8YI7LYZw
Please use the following code in your custom CSS:
.sppb-addon-feature .sppb-media, .sppb-media-body {
overflow: initial !important;
}
It will enable text part of the Featurebox addon in mobile view.
Note: Path towards custom CSS(Joomla 4): System>Site Templates Styles> Click on your current default template name then choose Template Options. Then find custom CSS within the custom code.
https://prnt.sc/5mBuSRh907N3
https://prnt.sc/ooiq-lkMEXr_
https://prnt.sc/nunlX-f5AhK1
The following blog post may also help about responsiveness:
https://www.joomshaper.com/blog/make-your-columns-responsive-in-sp-page-builder-4
Best Regards