How to start a search from an embedded Keyman keyboard? (SAB 7.0.3)

When entering a search term in the app using a system keyboard, such as GBoard, pressing Enter launches the search. (In fact, the keycap for Enter shows a magnifying glass icon to indicate search.)

However, if the scripture app has an embedded Keyman keyboard, pressing Enter instead creates a rather unexpected line break within the search term.

Is there a way to set up the keyboard so that a key there will launch the search? (Using Enter to create line-breaks is useful for the user to add notes.)