“Gift Card” Coupon for Piecewise usage of Amount

Hi there,

I am looking for a coupon mode, where I can sell Coupons like a “gift card” with preset coupon amounts e.g. 10€, 20€, 50€. What I need is, that users can use this coupon in a piecewise manner. For example, when having a 50€ coupon they can spend 20.50€ on their first order and still have 29.50€ left with their coupon.
Unfortunately I couldn’t find anything likely on the web.
So I am wondering if there is actually a possibility to implement this behaviour?
Any suggestions welcome.
Best
Muleque