Is there a way to recover data from a backup that was made in recovery?

I had a serious problem that made the phone unusable that forced me to do a factory reset, but before I did I made a backup through recovery.
Now I lost some important data with some of the apps that I didn't have a backup to.

I have some .tar files, how can I get the data of those specific apps back again?

BTW I tried to recover just the data through recovery but the same problem returned so that's not an option.