Hello, thanks for mapping.
On this task, the multi story / high-rise buildings are often incorrect mapped.
You can see both one or more side walls and the roof. The Imagery is taken under a certain angle, so you can see more than just the roof.
Often all visible walls and roofs are together mapped as 1 building.
The correct way is to map the roofline and move the whole object on their footprint.
See this video.
https://drive.google.com/file/d/1V5-bADsYiffCD9bo6l64YOdTvmKqMGry/view?usp=share_link
Best regards