How to add .fontWeight as part of a ViewModifer in SwiftUI

I am trying to create ViewModifiers to hold all my type styles in SwiftUI. When I try to add a .fontWeight modifier I get the following error: Value of type 'some View' has no member 'fontWeight'

Is this possible? Is there a better way to manage type styles in my SwiftUI project?

struct H1: ViewModifier {
    func body(content: Content) -> some View {
        content
            .foregroundColor(Color.black)
            .font(.system(size: 24))
            .fontWeight(.semibold)
    }
}

You can achieve this by declaring the function in an extension on Text, like this:

extension Text {

    func h1() -> Text {
        self
            .foregroundColor(Color.black)
            .font(.system(size: 24))
            .fontWeight(.semibold)
    }
}

To use it simply call:

Text("Whatever").h1()