From the recent report the iOS 13 compatible devices are below
IPHONE
- iPhone 6S
- iPhone 6s plus
- iPhone 7
- iPhone 7 Plus
- iPhone 8
- iPhone 8 Plus
- iPhone X
- iPhone XS
- iPhone XS Max
- iPhone XR
IPAD
- iPad Pro 12.9in first and second generation
- iPad Pro 10.5in
- iPad Pro 9.7in
- iPad Pro 11in
- iPad Air 2
- iPad Air 3
- iPad fifth generation
- iPad sixth generation
- iPad Mini 4
- iPad Mini 3