If there's some actual filings with the EU about this somewhere I'd definitely be interested to read them. If Apple's actually rejecting this application because "they used standard platform buttons in a standard platform way", then yeah, nail them to the wall.
I'm just not to ready to jump to "nail them to the wall" based on a company with a history of dark patterns in their UI designs claiming on Twitter that Apple took issue with their UI designs.
A non-insignificant portion of this fight has also been waged in municipal European courts, in case you forgot.
Apple has publicly commented that the buttons are in fact the reason for the rejection.
“Apple has since told AppleInsider on Friday that it has approved Epic's marketplace app. It has also asked Epic to fix the buttons in a future submission of the app for review.”
src: https://appleinsider.com/articles/24/07/05/apple-green-light...
You guys kill me, stay classy.