Both my Canadian and Spanish banks have the ability to show me my card details in the banking apps themselves. I pretty much rely on my phone for everything here in Spain (even most ATMs even have “tap” NFC abilities) so getting card details in an app is convenient for online purchases, instead of finding the card itself.

Both my banks have the card details behind the login screen (faceID or user/pass) to just open the app, and then a PIN to see the details, so it feels fairly secure.