Ability to see available ranges in a third party app before paying

Mrs. Caroline Mathieu of "infirmeriefamiliale" says that

Her clinic uses "STRIPE" to take payments from patients who want to book appointments through the portal.

The problem is that patients can't see the available ranges before paying.

They are redirected to the portal after paying only.

His question:

Is there a way to allow "Stripe" to display ranges before taking payments.

Problem:

They often have to reimburse patients who have not found ranges that meet their needs.