– Please use Safari browser to download profile configuration iOS 14.2 Beta1: 
iOS 14 compatible Devices
Apple says that iOS 14 can run on the iPhone 6s and later, which is the exact same compatibility as iOS 13. Here’s the full list:
- iPhone 11
- iPhone 11 Pro
- iPhone 11 Pro Max
- iPhone XS
- iPhone XS Max
- iPhone XR
- iPhone X
- iPhone 8
- iPhone 8 Plus
- iPhone 7
- iPhone 7 Plus
- iPhone 6s
- iPhone 6s Plus
- iPhone SE (1st generation)
- iPhone SE (2nd generation)
- iPod touch (7th generation)
Device details are updated and software updated HERE.