I'm having the same problem in Xcode 13, iOS 15. I think additional version of simulator occurs this problem. Xcode 13 default iPhone simulator(iOS 15.0) show dynamic type slider. But additional version simulator(iOS 14.5) didn't show that slider.

@DTS Engineer Thank you for answering my question 😆 I expect it to autocomplete as getAPI() when I press the return key in the state shown in the screenshot you provided. However, it always autocompletes as getAPI(from: <#String?#>). The same behavior occurs even in a new project. If I modify the existing code to the following and execute it, the autocomplete should behave the same. However, I’m not sure what difference is causing it not to work: import Foundation public protocol Repository { func getAPI(from url: String?) } extension Repository { public func getAPI(from url: String?) { getAPI(from: url) } } final class _Repository: Repository { func getAPI(from url: String? = "https://...") { // Task... } } let repo = _Repository() repo.getAPI( // Autocomplete suggest getAPI() first.