https://www.cnet.com/news/ios-12-1-setup-hints-at-new-ipad-this-fall-says-report/

9to5Mac found the identifier, which the site says wasn't in the setup assets before. It also reported that landscape support is coming for Face ID, as tweeted by developer Steve Troughton-Smith‏, which also indicates a new model. 

9to5Mac also spotted a Memoji Sync feature for iCloud storage of your Memoji.