Unknown library get imported using an XCFramework in Xcode

Question

I was following apple XCFramework video about Binary Frameworks in Swift in this link and that video they jump to definition of an XCFramework and it shows just Import UIKit at timeline of 4:36 so far so good, I just created and followed same way, but I am seeing some extra thing that I did not use it when I was building my XCFramework, what is import _Concurrency I just used import SwiftUI in my framework, how ever after building my XCFramework and using it in a test project I see this:

How ever my source code was this:

So why I am seeing import _Concurrency after building and import to test project? I do not need it why it must be there? am I doing something wrong?

import SwiftUI

public var iOS_EmojiFrameworkVersion: String = "1.0.0"
public var iOS_DeploymentVersion: String = "13.0.0"

public struct EmojiView: View {
    
    public init() {}
    
    public var body: some View {
        
        return Text("🥸").font(Font.system(size: 150.0))
        
    }
}