If you go to https://feedbackassistant.apple.com and create a new feedback (for iOS and iPad) item, then these are the types of feedback choices:
A suggestion sounds more like something an iPhone user want so suggest as a feature, not how a developer might request an API feature. Is that really what, as a developer, you are supposed to use to make a development feature request?
Did I miss something ?
When you select Feedback for Developer Tools & Resources, you can ask for API improvement.
When you submit a report you can select suggestion in the type of feedback:
Yes, I think that "suggestion" would apply to both user-visible features and API features.
FYI, I call this out in Bug Reporting: How and Why?.
Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"
Unfortunately the feedbackassist.apple.com website is no longer functioning.