WhatsApp actual size is in MBs but in iCloud backup it is several GBs
Many people have asked this since it’s not immediately clear that app developers can take up two chunks of storage in iCloud.

Data that’s stored directly in iCloud as direct cloud sandbox storage (you have 474 MB in this bucket)
Data that exists on the device as local sandbox settings that the OS backs up to iCloud (you have 10 GB in that bucket)

The 14 GB is all the backups and snapshots, so everything looks appropriate to me.