Is there a way to dynamically set onDrag on and off in SwiftUI?

Question

I have reorderable rows with an editable text views inside. To make rows reorderable I use the solution similar to this. What is important here, I add .onDrag modifier to the rows contents. The problem is, I want to disable dragging rows while keyboard is on screen and user edits the text. The solutions to this question here, like using if case, break the text editing: text loses its focus and keyboard does not appear.

if !isKeyboardVisible {
    rowContent
        .onDrag {
            // prepare drag
            return NSItemProvider()
        }
} else {
    rowContent
}

I would like to make something like this instead:

rowContent
    .onDrag {
        if !isKeyboardVisible {
            // prepare drag
            return NSItemProvider()
        } else {
            return nil
        }
}

But it is not possible. If there are any solutions, I would appreciate your help.