It’s already trivial to get local banking details from many countries, (e.g., ‘multi-currency’ debit cards) but as far as I’m aware there’s not a practical way to get a foreign debit card without the usual hoops that the full account would require.

Probably because demand for such a thing is low - I can generate disposable card numbers on the fly, but only from my home country. Can’t imagine (aside from this specific edge case in question) generating foreign card numbers would be all that useful most of the time.

End-user support for such a thing would also be a challenge - I’m very accustomed to entering the usual data points with my card, but users would forget the associated postal code, or any number of other things, and then call support whining that it’s ‘broken’.