To earn rewards through the Program, you need to have completed at least one objective in Ghost Recon: Wildlands before 27 September 2019.
You can check what you managed to unlock on the Club website!
Once you have completed the first Ghost Recon Breakpoint mission, visit Holt in Erewhon to access your rewards.
Please note that the Oh and one last thing... challenge reward can only be collected from Jace Skell later in the game.
Note that the Ghost Recon Rewards Program rewards are not available between different platforms. For instance, unlocking rewards on Ghost Recon: Wildlands on PC will only grant you the relevant rewards for the PC version of Ghost Recon Breakpoint. We are not able to transfer this content for technical reasons
Feel free to get in touch if you have any other questions!