Where ever bitcoin Lightning payments are accepted. And for zaps of course.
Discussion
No, I mean ecash directly. Or it’s not the point, and it has to be through lightning all the time anyway?
I see what you mean. There are many possible use cases to handover ecash, like printed vouchers. Compared to lightning, ecash is like a bank note.
As well, if both parties in a transaction accept ecash from the same mint, lightning is not involved.