@gpatel-fr
Vndk deprecation happens in Android 15, not 14 - unless Halium 14 means Android 15 ?
I think the only thing UT has to do with VNDK is mount the correct partitions to be read by the android container, which handles the rest. Ask in the porting group for more detail, there are already some short discussions around it.
to check the vndk version, it's necessary to enable debug mode on the phone, connect a computer through usb and use adb
You can install an app called Treble Info from F-Droid.