iOS 18.6.2 update wipes Calendar, iCloud data recovery limited to midnight

i have recently updated to ios 18.6.2 and my calendar has been wipped- i have tried to get it back with data recovery but has nto worked and cant go further back than midnnight

I have logged into iCloud and attempted to date recover from a previous date but it only has 1 option of midnight and doesn’t go further back.

[Edited by Moderator]