Two most common causes:
Stripe Connect onboarding incomplete. Stripe requires you to fully complete their onboarding, if you stopped partway through, your account is in a pending state and content won't publish. Go to Dashboard → Paid Content. If you still see Connect Stripe, tap it to pick up where you left off and finish every step.
Your plan ended. Paid content shows on your page only while you're on Pro or Lifetime.
If both look correct, contact support with your handle, and we'll check your Stripe Connect status directly.