Final designs
Based on feedback, I simplified the content of the "My QR Code" view and relocated all buttons to the bottom of the screen where they'd be more accessible.
Because the tab switcher was necessary for switching between views, I changed the design to a bottom sheet that could be displayed on any screen where "My QR Code" was invoked.
To make the QR Code more discoverable, I redesigned the profile card to include a QR code icon that would launch the My QR Code sheet.
These final designs were received more positively than the first iterations.