Update: My app was approved on October 23rd so it spent 28 days in review. It was a tough wait but I'm glad I didn't pull the app and resubmit.
Just in case this helps anyone in regards to expectations for a new app, my app supports iPhone, iPad and Watch with English localisation (I use words like colour/color and customise/customize), and it has subscriptions. I also submitted screenshots in four regions for iPhone, iPad and Watch.
Topic:
App Store Distribution & Marketing
SubTopic:
App Review