Once the core is updated with chatmail/core#7360
this line
  
  
    
        
           | 
           providerQrData = DCACCOUNT + ":https://" + providerHost + "/new";  | 
        
    
   
 
should be changed to use 
DCACCOUNT + providerHost as the default QR code when the core is updated.
This will make it use no-HTTPS onboarding.
Desktop PR: deltachat/deltachat-desktop#5618
iOS issue: deltachat/deltachat-ios#2855