Cannot lock iOS Shortcuts app with a Shortcuts Automation

Unlike Wallet, or a banking app, most iOS apps do not lock themselves when you go away from them. 

You can now set up an Automation using the Shortcuts app which locks the screen when any specific app is opened. You then need to unlock the phone to get to the app. This is not quite like the app itself requiring an unlock, but close.

The list of apps which can be chosen for an automation appears to include every app, except the Shortcuts app itself.

So if someone gets access to my phone when it's open, and knows about the Shortcuts screen lock, they can just go to the Shortcuts app and delete the automation. This makes it pretty weak protection.

Anyone know a workaround?