Sorry that I haven’t been more clear.
It is an official plugin. I did not develop it, but I’ve been looking at it rather closely lately.
It sounded to me like you know how to configure stripe to allow those other payment methods, so I bet you’ve done it right.
Unless there is something I’ve missed in the plugin code (which is possible, but I’m pretty sure that Discourse is what displays the payment page and not code from stripe) I think that the plugin would need to be changed to support payment methods other than credit cards.
Maybe someone else will have some other ideas.