Can’t install ios17 in Xcode 15 Sonoma

it’s been a long time since i have used Xcode, so am a little unfamiliar . I am building an Ionic - Angular app form Visual Studio Code in Xcode ver 15.0 (macOS Sonoma), I get a prompt in Xcode :

app > iOS 17.0 Not Installed --BUTTON {GET}-- However when I click GET , a recent download of the iOS17 simulator pops into view, and the download of iOS17 does not commence. I can not progress from here and cannot build or run the app.

Possibly missing something very simple here but I can't seem to find a means to download iOS 17 and thus build the app. Thanks