I had created strife as payment gateway and selected it as the default payment gateway. Still in the hosted environment tried creating payment and it didn't reached to strife.
I had a quick look at the subscriptions on your test site and the recently created ones are still in trial. Only when the subscriptions are activated, payments will be collected from the customer's card and the same will reflect in Stripe. You can try activating those subscriptions (Change Trial End Date to now) and the payments will be reflected in Stripe.