Unity ads and Apple UiWebView deprecation problem

So apple won’t accept new submissions using UiWebView in their projects… so I have my game, ready to ship, Xcode validates it ok, and I can upload it to iTunes connect,
but it doesn’t appear in my list of builds, and I receive an email saying UiWebView is deprecated… remove it from your app and re submit…
hmmm
so after some googling the likely candidate seems either Unity itself 2019.1 or unity ads. ( i have no non-unity plugins)
I have ads enabled in Services panel, and from package manager I had ads version 2.0.8,
so this all works… shows ads in builds… etc… but cannot submit to store.

sooo I remove 2.0.8 ads with package manager, upgrade to ads version 3.5.4 from package manager… build installs and runs on device. but ads do not work. no errors in log.
uninstall 3.5.4 reinstall 2.0.8 build and ads work again. hrmmm…

googled more… it said to turn off checkbox “enable built in ads extensions” tried that… it builds but no ads show, and there is a warning in services saying to install ads plugin ( though its already installed from package manager)

from a different google is says to edit Xcode settings ads folder UnityAdsUnityWrapper.mm file target and uncheck iPhone… this also compiles build, but also shows no ads.

then I thought… perhaps I am adding ads in two ways? from services window, and from package manager, so I tried removing the package… then unity doesn’t recognize any of the ads code in my project… bunch of compile errors…

ok so… after all that…
Please, Does anyone know how to install ads in 2019.1 so that they 1) work 2) don’t have UiWebView. …so I can submit to iTunes connect please?
Help appreciated… I’m sure others have / will have this same issue soon, due to that deprecation

answering my own question… so I had to update the game to 2019.3
uninstall old ads via package manager, update to latest Unity Ads via package manager.
Throw out my old ads code, and re-implement it according to the unity ads docs for 2019.3, including some new game-id and placement strings setup on the unity dashboard.
Ads are back and working in my app.