If you can't find a crafted card in your collection, please make sure that you have set appropriate filters in your card collection. Filters panel is on the right side of the card collection screen.
If you are sure about the filters, but still can't find the card, please report the issue to us, make sure to provide the details below in the decription:
1. Card name and if it was premium or not.
2. Date and time (+timezone) when you crafted the card.
3. Screenshot of your card collection showing that you don't have the card.
Information how to make a screenshot on Xbox One is described in this article.