Android device does not recognize apk.

I am building (you can decode): build-btchat-Android_Qt_6_5_3_Clang_arm64_v8a-Debug (for release too, with signing also...);
I am using:
-C:\Program Files\Eclipse Adoptium\jdk-17.0.8.101-hotspot, gradle here is 8.0 (automatically set);
as I remember the chain:
-The Android gradle plugin wants Android min build tools 30.0.3 (not 29.0.3, I am tried for android-29);
-android-29;
-ndk\23.1.7779620 (I experienced some problem by trying to use 25.1.8937393, relating to begin and end.so.o and additional libraries missing).
=here a problem relating to manifest android:allowNativeHeapPointerTagging was experienced (solved by custom manifest, trying =false, =true, and finally deleted from the manifest);
=BUT the build apk is not installing on android 10 device tablet, and by using SAI (Split APKs Installer) app the error is: INSTALL_PARSE_FAILED_NOT_APK.
There are some points in Internet about this, but what is going wrong?

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Here is another non-on-device recognition, but with build verification signing logs:
BUILD SUCCESSFUL in 9m 48s
40 actionable tasks: 40 executed
Verifies
Verified using v1 scheme (JAR signing): true
Verified using v2 scheme (APK Signature Scheme v2): true
Verified using v3 scheme (APK Signature Scheme v3): true
Verified using v4 scheme (APK Signature Scheme v4): false
Verified for SourceStamp: false
Number of signers: 1
WARNING: META-INF/com/android/build/gradle/app-metadata.properties not protected by signature. Unauthorized modifications to this JAR entry will not be detected. Delete or move the entry outside of META-INF/.
Android package built successfully in 675.637 ms.
– File: C:/Programs/qt/Examples/Qt-6.5.3/widgets/painting/build-affine-Android_Qt_6_5_3_Clang_arm64_v8a-Release/android-build//build/outputs/apk/release/android-build-release-signed.apk
15:54:36: The process "C:\Programs\qt\6.5.3\mingw_64\bin\androiddeployqt.exe" exited normally.
15:54:37: Elapsed time: 16:36.