IOS27 force the developer to apply the new look and feel.
My project set the Navigation View background to red and there is a search bar on the section which background is set to white.
It work well under IOS25 and IOS26 by using UIDesignRequiresCompatibility
It won't work any more under IOS27 and result a ugly background color on the searchbar, the goal is do the same in IOS27.