Don't worry! As the purchaser of the gift voucher, you have access to the gifted voucher's link too. To find this, just open your Fave app, click on the "Me" tab, and select the said voucher that's listed under the My Vouchers section.
You will see a URL link appearing on the voucher (beneath the Receipt-ID). You will be able to click on the link to copy it, and you can then send the link to your intended recipient directly instead.