Yes. The rear wheels can roll when the rollator is folded.
Please make sure the brake handles are in the released position. Then gently pull the brake cable backward to create enough space between the brake pad and the rear wheel.
This will help the rear wheels roll more smoothly while the rollator is folded.
You can watch the video here:
https://youtu.be/SwRRSxvSTuY?si=7wKPP8IfHDAwh2Vy
Please make sure the brake handles are pulled up / released, not pushed down in the locked position.