Is there any way to retain report ids and CUIDs to be the same in case Reports are migrated from Dev to Prod Environment by directly copy and pasting the modified report.
How are you copying & pasting reports from Dev to Prod? Are you using the same instance for both? That’s the only way I can think of where copy/paste would work and that would definitely result in different IDs and CUIDs.
Usually dev and prod are different instances and you use Promotion Management to move content. SI_ID will be different in each environment, but it will maintain the CUID.