How do I uninstall the app from my cloud once I have deleted it

That indicates that you have previously purchased the app and that you can redownload it at no charge from the App Store. I understand that the use of the cloud symbol could be interpreted as it being part of your iCloud storage but it is not. The following has information about iCloud storage that may help: Manage your iCloud storage - Apple Support

Note that some apps can store or backup user data in your iCloud storage, but the apps themselves are never stored in your iCloud storage.

Apps are not included in your iCloud storage, before or after you delete them from a device.