f you’ve uploaded an AAB to a track (internal testing/closed/open/production) and use Play App Signing, you can download the Google-signed APKs from Play Console’s Latest releases & bundles (“App bundle explorer”) — including a “Signed, universal APK” and device-specific APKs. Google Help+1
Test and release → Latest releases and bundles → All app versions → pick your version → Downloads tab → download Signed, universal APK (or device-specific APKs). Google Help