Admob ads showing in Kodular Companion but not showing in real app

[cian]

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Admob Ads Problem

When i export my apk admob ads are not loading and when i test in kodular Live test app ads showing and when i paste same ad unit in appybulider ads showing . I already read koduar admob ads not loading post . But When i export apk its not showing and when i test apk ads showing . Why ? . I think it is a kodular falt . Tell the sloution . And i alreday publish my apk in play store