Choosing app for snap areas should allow entering package to find helper apps.

I use Docker Desktop, and I would like to set a snap area for this application, but the Docker is actually a helper app within The current selection dialog for choosing an app does not allow me to enter the package content to find the helper app.

This behavior is different than a Finder window. In a Finder window the context menu includes a choice to "Show Package Contents".

I found a workaround. From within the dialog to select an application use the Finder shortcut to get the Go To Folder prompt (⌘ cmd + ⇧ shift + g) and enter /Applications/.app/Contents and hit enter. Now navigate to and select your desired helper / child app.