You might want to check out True Link Financial (https://www.truelinkfinancial.com/). Not sure what the current state of the agreements are but you can use it technically for this sort of thing.
Thanks for the link. I looked at them. They even have one targeted specifically for Caregivers. (https://www.truelinkfinancial.com/caregiver-card) While it sounds like a decent option, I'm turned off by a $10 monthly fee. I know they have to make money somehow but I have never been keen to pay fees for my money. :/