We have the same issue either. We use Expo (react native) and always set "ios.supportsTablet" to be false on building app. In the past, our app supports only iPhone, but suddenly start to show that it supports iPad and Apple Watch as well in the latest build and submit, even though we dont support it and didnt change the "ios.supportsTablet" setting. We hope this issue will be solved soon.
Topic:
App Store Distribution & Marketing
SubTopic:
App Review