iOS 15

You can change the return key for each textField with a simple modifier called: submitLabel that takes the return key type:

_{Image from WWDC21}

Also, as you can see, you can have a callback to handle the return key press action just like the old textFieldShouldReturn function that is accessible by .onSubmit modifier.

_{⚠️ Seems like there is a bug on Xcode 13 beta 1 that prevents this modifier from working in some situations.}