Venmo payment

I pay my rent via Venmo. I made the payment via the app, the funds were taken but my landlord hasn’t received the funds. She received an email regarding PayPal saying they were delayed due to additional reviews. What does PayPal have to do with it and why hasn’t she received the funds? I’ve sent 3 emails since the chatbot is useless in this case and haven’t received any response. Anybody with similar issues? Anybody know how to escalate?