Swift apply .uppercaseString to only the first letter of a string

Edit: This no longer works with Text, only supports input fields now.

Just in case someone ends here with the same question regarding SwiftUI:

// Mystring is here
TextField("mystring is here")
.autocapitalization(.sentences)


// Mystring Is Here
Text("mystring is here")
.autocapitalization(.words)

All in lower case .lowercase()

For first letter upper & other lower .capitalized

All in upper case .uppercased()