OK, then you should be able to send it again. Have the recipient check the junk mail in case it went there. On step 7, make sure the email address is spelled correctly and as step 8 notes, if you do not see the option to Resend Gift, then it means it was already redeemed.
- Open the Settings app.
- Tap your name.
- Tap Media & Purchases, then tap View Account.
- Sign in to your Apple Account.
- Tap Gifts.
- Tap the gift that you want to resend.
- Make sure that the recipient's email is spelled correctly. If you need to edit the recipient's email address, tap their email address, then tap it again and enter the correct address.
- Tap Resend Gift. If you don't see Resend Gift, it has already been redeemed.