Display Snap QR codes on signage inEvent

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Like this image and video, it is QR coded so that users can download it after the photo is taken.
How can this be done?
https://www.youtube.com/shorts/dZuULJ9BJEE

This is not a SNAP, but it is also helpful.
https://www.youtube.com/shorts/FdBxq7_rS18