Some few apps will require that certification but they can simply be installed by downloading the apk, after you install using the APK even updates will work from the Play Store.
The only app i seen present this problem was NetFlix.
Either way, we are working on Android 14 update where it will be 100% certified, you will get this update soon enough, the only reason the current ROM isnt was because we needed to do some changes and google was asking for re-certification.
A simple way to download the APK for manual install is using a website like apkmirror.com

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