V12 New Feature: Scan barcode using camera in mobile NOT Working

Based on the v12.1.3 update, this new feature (feat: Scan Barcode using Camera in mobile by netchampfaris · Pull Request #19033 · frappe/erpnext · GitHub) will enable users to scan barcode using camera in mobile.

However, it is not working. The camera button is nowhere to be seen.


Is there anyone who can give an update on this?

I have the exact same issue.
OS: Android 11

Can some one help in this matter please?