Google Wallet shortcut (Lockscreen or double power button press)

I often use Google Wallet for loyalty cards and boarding passes. Unfortunately, there doesn't seem to be a way to add an easily accessible shortcut.

The lock screen shortcut doesn't work as I would need to add a payment card, which doesn't work for obvious reasons.

Double pressing the power button can only open a camera app.
It would be cool if we can customize the power button double press.

Has anyone found an easy way to quickly access the wallet app?

I'm not aware of a shortcut, as such, on GrapheneOS. There is a quick tile for Google Wallet, but that doesn't seem to work, at least on my device.

The only way I am aware of in which you could access your Google Wallet from the lock screen is if you temporarily pin the app.

Aside that you'll need to unlock your device, and manually open it from the home screen, app drawer, or recents screen.