I second @sreeraj on this.
I currently use a iPhone SE (small 4.7" screen) and access to “Login to Desktop via web QR” is three clicks away.
- Click on my user name
- Scroll up the list
- Click on “Login to Desktop via web QR”
Making the changes are requested will reduce the number of clicks.
Having said that, I can always use the option to use mobile number and sms which are also many clicks away.
Hence, I request you to reconsider this change as @Sreeraj has asked for.