Gift Cards should work for everything?

I'm trying to add Gift Cards for my clients to buy and use for future classes on Squarespace Scheduling. 

Is it true that I need to go back to each different Gift Card (I've made separate gift cards for each amount, 50$, 100$, 150$ etc) every time I add a new Appointment Type, and add that Appointment Type to be redeemable for the Gift Card? I have about 15 different Gift Cards, and add new Appointment Types every month or even week, so it will eventually take me hours to do.

What am I missing?

Is it possible to add Gift Cards that works for any and all present and future appointment types? 

Picture shows that I need to actively check a box to make the gift card work with the appointment type. If I add a new appointment type, it is not added by default, and I need to go back and add it on the Gift Card menu/options for each Gift Card.