How to check your messages and deleted messages from iCloud
Does your message go to iCloud even the Delete one
iPhone 7 Plus, 14
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IF iCloud for Messages is used and set to ON in Settings ➔ Apple ID ➔ iCloud, then all Messages are shown on your iPhone in the present and live state. When you delete a message on your iPhone then it is immediately deleted from iCloud as well with no other way to retrieve it.
Axel F.