I'm running LR6 and had a hard disk failure. Photo's and LR catalogue were back up on my NAS. I've transferred the photos back to a new hard drive successfully. How do I tell LR to reapply the post processing enhancements that were made to the photos prior to the HD failure.
You've posted in the forum for Lightroom (cloud-based), so I will move this to Lightroom Classic.
You'll need to copy your catalog backup into your new drive, open it in Lightroom, and reconnect it to your new photos location. Please explain in more detail what you have already done, and we will help to get you the rest of the way there.