Indeed, Subscription created event should be followed by Regular payment made event with the amount populated. And this event is delivered by a webhook.
When Stripe can’t deliver several webhooks in a row, it sends you an email notifying about the issue. I assume you haven’t received those? Check your SPAM or JUNK email folders just in case.
Now let’s try to check if webhooks are OK. Go to here https://dashboard.stripe.com/webhooks and see if webhook URL is properly formed. It should be https://example.com/?asp_hook=live, where example.com should be your website URL. If it’s correct, then try to access the URL. You should see following message: Empty Webhook data received.. This means your webhook URL is correct and it can be accessed via browser at least.