If a new developer, best to learn SwiftUI (and SwiftData) first, because it’s quicker, and will definitely be needed in the future… then expand your knowledge to cover UIKit (and Core Data) in due course.
If my job was only create new stuff, ok, only studying SwiftUI But I give maintenance to codebases with code from 2015 at my actual job. And it's the biggest bank from my country, so yes, I need to know Obj-C too.
Most of Projects and Advanced APIs still in UIKit
If a new developer, best to learn SwiftUI (and SwiftData) first, because it’s quicker, and will definitely be needed in the future… then expand your knowledge to cover UIKit (and Core Data) in due course.
If my job was only create new stuff, ok, only studying SwiftUI
But I give maintenance to codebases with code from 2015 at my actual job.
And it's the biggest bank from my country, so yes, I need to know Obj-C too.
Cause they are ok with making some basic shit and never finish a project.😅