Erased messages
can I erase my text messages from my computer
iPhone X
User profile for user:
Community User
If you have a Mac that is connected to the same Apple ID as your iPhone - and Messages in iCloud is activated, then you can access your messages in the Messages app on your Mac, and delete them exactly like on your iPhone.
It's MacOS only. This cannot be done on a Windows PC.
You can see how to use Messages on Mac:
Use Messages on your Mac - Apple Support