How can I access text messages stored in the cloud
How can I access text messages stored in the cloud
iPhone 6 Plus, iOS 11
Sorry, there is no option to do that.
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.