is there a way to show HR Cases with variables data to non-HR users

[MahalakshmiD]

As part of onboarding process there is a group of non-hr people would like to see the data related to specific HR Cases

[Mark Manders]

Not OOB. HR Cases are secured from other users. You could add some custom functionality, but you should also ask yourself why these people don't have access when they need to? Are they managers? Why not put them in requested for? The subject is filled with the user that is onboarded, so add other people there.

Or just create a notification for them to get the info.