Coinbase isn't available to US citizens so far IIRC, only Europeans, and the original poster clearly said he lives there.
Who can sign up for a Coinbase Card?
So he/she can't.



Don't worry the UnionPay cards aren't massively accepted in Europe, with P.O.S it's ok but not all ATMs accept UnionPay network. I believe the problem in Africa is its ecosystem since I know the majority of transactions are done with cash (a lot of unbanked persons, not everyone internet access, etc...)
I suppose it will work, for example, there are Bank of Africa or Ecobank available in many African countries and providing Mastercard...