Several rear cameras - Huawei Mate 20 Pro

There is no option to chose rear camera. My Huawei Mate 20 Pro has a regular and a wide angel camera (as well as a tele lens camera).

From start the regular camera is activated. But if the capture gets interrupted by a phone call then when I go back it uses the wide angel? And then there are missing a part on the right side of the screen to?

Also have issue with the exposure is prioritising the sky and not the road? There are no way to chose the lower part of the view for exposure?