No, unfortunately it is not possible to donate only part of the amount - neither before nor after the gift card is activated.
🧾 Why not?
This is due to the electronic money regulations, which state that the funds on a prepaid card cannot be split up or transferred afterwards in this way. Once the gift card is activated, it must either be used as payment - or not at all.
❤️ What can you do?
You can donate the full amount of the gift card before you activate the card. You can do this via the link you received by SMS or email.
After the gift card has been activated, it cannot be donated - neither partially nor in full.