If you are sure the region is correct, but the icon shows a "Corrupt Data" symbol (a fractured box), or the game claims the content is unusable, you likely have a license syncing issue.
Ultimate Guide: How to Fix PS3 DLC Issues If you’re seeing the dreaded "content not found" message or your newly installed maps and characters aren't appearing in-game, you aren't alone. Fixing PlayStation 3 (PS3) DLC typically involves resolving region mismatches, licensing errors, or installation order bugs. Ps3 Dlc Fix
Manually use PS3Tools (PC) to resign DLC to your console's IDPS. This is the professional method but requires a PC. If you are sure the region is correct,