Are you sure you have the file at /your-ips-folder/system/Content/ShareServices/Whatsappcvh.php? I uninstalled the app, deleted the file on my system, and then uploaded the file again. Simply by doing that it shows up as 'Whatsappcvh' in Admin CP > System > Sharing. I downloaded the plugin and installed from there so the zip doesn't seem corrupt.
The plugin install itself is for the template, language strings, and settings rather than making it show up in Admin CP > System > Sharing.
What do you mean? I just downloaded the zip and see both the xml file and the /upload folder. The file that is necessary should be at /your-ips-folder/system/Content/ShareServices/Whatsappcvh.php on your server after you upload the contents of the /upload folder.