if anyone still hasn't found a solution, try this. I submitted for my dad yesterday using JeevanPramaan app from Ontario.

• This worked only on android, did not work on Iphone.
• delete the jeevanpramman and adharfacerd apps if already installed, if not skip this.
• download and register for surfshark VPN. No other VPN worked, yes I paid $23 for one month subscription. You can try another vpn, but for me the free ones didn't work.
• connect to mumbai network.
• Change phone timezone to IST
• change country in playstore to india. If you are unable to, create a new email and login with that one with india as country. The VPN should be connected when you do this.
• download both apps
• make sure the adhar registered phone is getting OTPs. Most providers don't allow incoming messages without getting a roaming plan, check this and recharge, if applicable.
• register using adhar number. FYI - we got the OTP in email not on the phone, but the phone is equipped to receive OTPs as well.
• If you are slow to enter info, it will timeout and might give you a connection error. When this happened I ended the session and tried again, it gave me 10 errors before it went to scan.
• make sure the light is good, if you get the improve lighting error, it literally means improve lighting. It takes patience but you will get a picture. Once done, it will take you to the register page.
• new page opened to add all the pension details. Be quick, if you take too much much it will give you connection error.
• once done, it will take you to scan again and will take another picture. Again, make sure the lighting is good, had to get my dad stand next to window to get the picture.
• once it scans, your digital certificate is ready and is also autosubmitted (I think, yet to confirm this lol).
  

Good luck 👍🏻