User Agent in ipad not detected

WebviewScaffold(
primary: false,
resizeToAvoidBottomInset: !Platform.isIOS,
userAgent: "SomeRandomUserAgent",
url: "$someUrl",
appBar: ab,
initialChild: Container(),
withLocalStorage: true,
withJavascript: true,
);


We have tested this in iphone ipad android simulators and devices and it works on iphone and android
but not in ipad.

what appears - in ipad - according to our logs is
"Mozilla/5.9 (Mackintosh; Intel Mac OS X 10_15_4) AppleWebKit/605/1/15 (KHTML, like Gecko)"

Otherwise it "SomeRandomUserAgent"