System Font with custom size for text style

Aim:

I would like to know how to use a system font in my SwiftUI app with a custom size that supports dynamic size (that changes when the user changes the text size on the device, font size changes dynamically).

Problem:

I can use the standard .body, .title etc for system fonts, however I want to use a custom size which is slightly different however still want to make sure it works with dynamic types

My Failed Attempt:

//Font size doesn't change when the user changes his preferred text size on the device
Text("hello")
    .font(.system(size: 14, weight: .bold, design: .default))

Note:

I am targeting iOS 15, I am looking for something on the lines of the following for system font:

static func custom(_ name: String, size: CGFloat, relativeTo textStyle: Font.TextStyle) -> Font

Questions:

• Is there a way to specify the system font name in the above API? If so what is the font name for iOS 15 and macOS Monterey?
• Is there any other way to achieve dynamic fonts for system font with custom sizes?

Following Font function helps achieve custom font size relative to TextStyle:

static func custom(
    _ name: String,
    size: CGFloat,
    relativeTo textStyle: Font.TextStyle
) -> Font