I want AdGuard VPN to be off for a specific app

To exclude an app from AdGuard VPN, go to the main menu and tap the third icon from the left. In the next Apps settings screen, search for the required app and set its toggle switch to Off.

When you use AdGuard VPN in Compatibility mode with AdGuard Ad Blocker, Apps management is disabled in AdGuard VPN. In this case, AdGuard VPN is on only for the apps filtered by AdGuard Ad Blocker.