Configure a per-app VPN aways on (kill switch)

Hi guys, I need to configure a VPN to work only for specific apps. I already have a supervised iPhone, and I’ve successfully configured the VPN, but right now it applies to the whole phone. I need it to work just for some apps.

I tried using both Apple Configurator and iMazing, but I can’t find this option there.

Configure a per-app VPN aways on (kill switch)
 
 
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