Android app icon does not fit the icon frame on Android device

[ZINE]

Hi,

I built and deployed an android app on Qt6.8.3. When the application is deployed on a Android-33 phone, the app icon is smaller than the frame of the app icons on the phone, as illustrated below by red for Calqlatr app. I included the icon in the AndroidManifest.xml with different resolution (LDPI, MDPI, HDPI, XHDPI, XXHDPI, XXXHDPI).
I would like to have the app icon similar to the whatsapp icon in the below image (it fills the frame). Any advice please ?

[mvuori]

Apparently nobody knows - I included. I have three phones and this happens on one of them, yet every other app behaves similarly on all three. The phone has seen many OS versions, Qt versions, SDK versions and even screen resolutions; OS is LineageOS.

[J.Hilk]

Usually this happens when the Icon itself has white space. Usually people try to accommodate round corners to match the other Icons on the phone. But the round corners come from the OS itself, so the Icon has to be "fullscreen"