We suggest you dont waste your time
Why: because
i) even if you submit an app to the store with ads SDK working, its unlikely any ads will get displayed at all
ii) fill rates have fallen off a cliff for apps that get past i)
iii) you have until June 2020 to change to a different ad provider ad the MS Ads SDK + infrastructure is being discontinued from then.
See the forums for more info on any/all of the above.