What is the point of your project to issue your debit card?
For what purpose can I use a debit card and why bind the card to a mobile application?
A debit card will have large payment limits abroad. You will not have problems with travel and cash withdrawal for a large amount.
Who will service the debit card? What limits will be set on the card?
Will it be a visa or mastercard card?
Judging by the large limits on the card, it will be a bank from the offshore zone.
I am interested in what currencies will be opened on a debit card