In the redeem page it is indicated that you have until May 31st 2025 to redeem your code → Get 6 Months Free of Adobe Substance 3D on Fab.com | Fab
“Every Epic ID user is eligible to receive a single code and Adobe will permit only a single code redemption per Adobe account. Redemption of multiple codes through our platform is not permitted. Codes must be redeemed by May 31, 2025 to activate your subscription.”