You cannot redeem this certificate because it has been disabled.
I have several gift cards that I bought a long time ago. Some of them are intact, some I have partially spent. When I tried to place a new order, it turned out that they were no longer active. I didn't know they had an expiration date. I tried to add them to my account and got an error (Screenshot attached.) I ask support to contact me and resolve this issue.
MacBook Air, macOS 12.4