When I asked for this, I never got an explicit response. The entitlement just showed up. Keep a lookout for a compile time warning about missing the entitlement in your entitlements file. THEN add com.apple.developer.usernotifications.critical-alerts = YES to your entitlements plist file. If you don't get that warning (and you haven't already added the key), your request has not been approved.
Bob_Easterday
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