Hello. Thanks for mapping.
Please take a look at this video how you have to map a high building.
First imagery = Esri, second = Bing witch shows more sidewall.
Just map the rooflines and move the whole mapping to the footprint.
https://drive.google.com/file/d/1hPkQqBa-C1oA_H_6fcgYGvAW34DFQ9o7/view?usp=drive_link
Best regards