For phone web I am not able to see any page templates. Getting this problem – Your project does’nt contain any page template you can create a page template locally or download a UI resource package from app store.
I also noticed that they are no longer available in the latest AtlasUI versions. You can do two things:
Download an older version of Atlas UI that still contains a phone specific layout.
Create a phone specific layout yourself. You can do this by duplicating an existing layout in the Atlas_UI_Resources → _Layouts folder. Go to properties and set the Layout type to Phone specific:
This way you can completely customize your phone specific layout to your needs.