i cannot find my messages in icloud but it is showing messages in the useage

See the information in Use Messages in iCloud - Apple Support including the following:

You can use Messages in iCloud on your iPhone, iPad, iPod touch, Apple Watch, and Mac. For your privacy, Messages in iCloud is end-to-end encrypted,* which means you can't view or access Messages online via browser. 

Or if you don't turn on iCloud Messages, iCloud Backup will then include Messages. But you cannot view the contents of an iCloud Backup, you can only use it to do a full restore of a device or to set up a new device. See: What does iCloud back up? - Apple Support