Lost iMessages

Hi all, I think I deleted my iMessages on my iPhone 11 by mistake. Didn’t worry because I cloud back up is on, even for the iMessages.

jumped to my Mac book and saw that the messages are disappeared. Same happens to my iPad.

restored iPhone 8 to get the messages from older iPhone back up and later from 2 older iPhone 11 back up. Still didn’t help to see my iMessages.

now restored my iPhone 11 to an older version . Didn’t help

in all cases iCloud back up is on..

cam anybody help?