I have a tikwatch e2 and an iPhone XS and I installed the Facer app on the iPhone and the e2 but I can’t get it to show the QR code
If you don’t get an answer here, you could sent a request to the official support people:
https://help.facer.io/hc/en-us/requests/new
or
send and email to: Facer-support@little-labs.com