Sure you can, you just have to complete the OAuth2 login on a different device (e.g. phone) and then forward the token to the device which has no web browser.
On the phone itself the WebView limitation is worked around via deep linking (start Browser from App and once logged in start App from Browser with token).
There are tons of different ways how to do this actively being used.
On the phone itself the WebView limitation is worked around via deep linking (start Browser from App and once logged in start App from Browser with token).
There are tons of different ways how to do this actively being used.