run-safari provides an (undocumented) option --ios-simulator to launch MobileSafari in the iOS simulator. However, passing --ipad-simulator is ignored and launches the desktop safari.
<rdar://problem/63002849>
Created attachment 398826 [details] Patch
Committed r261397: <https://trac.webkit.org/changeset/261397> All reviewed patches have been landed. Closing bug and clearing flags on attachment 398826 [details].
Thanks - with this fix I'm able to launch my iOS Simulator build on the iPad simulator!