in future is it possible to support sub ios 13 version?
It is very unlikely to happen. The runtime needed to run features marked as Available: iOS 13.0+ are provided as part of the IOS 13.0 (or later) installed in each user's device. Whether you use UIKit together or not, SwiftUI apps would not run on previous iOS than 13.0.
Topic:
UI Frameworks
SubTopic:
SwiftUI
Tags: