See text messages in iCloud backup
How can I see my text messages in icloud
iPhone 8 Plus
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How can I see my text messages in icloud
iPhone 8 Plus
You can't. See the following from Use Messages in iCloud - Apple Support
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.
Also note that you cannot view the contents of an iCloud Backup; you can only use the backup to do a full restore of a device or to setup a new device.
You can't. See the following from Use Messages in iCloud - Apple Support
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.
Also note that you cannot view the contents of an iCloud Backup; you can only use the backup to do a full restore of a device or to setup a new device.
See text messages in iCloud backup