Looks like this change wasn't intended and hopefully stripe rolls back out the functionality you were using.

I'm a huge fan of Stripe so I'd give them a chance to get this resolved for you before switching.

The stripe api is great to work with so you might benefit having a custom web application built to interact with it and make things more efficient on your end and not depend on their dashboard.

Doing this through the python library might be even easier than Postman