The iCloud container has the wrong display name on my Mac. I added the container to an iOS version of the app (which isn't released yet). The mac version is the primary app. In the info.plist of both apps (the released app and the app that isn't yet released) the ubiquitous container name matches the mac version, but the iOS app name still shows up.
iCloud drive folder has wrong display name
(I'm presuming by 'iCloud container' you meant the 'app's iCloud drive folder.')
Incrementing the version/build number is supposed to provoke Finder to update its information to correspond with the info.plist. Has that not worked for you?
R