Azure Application Gateway introduces support for TLS and TCP protocol termination in public preview. This feature lets you use Application Gateway for non-HTTP applications based on protocols like SQL, MQTT, AMQP, etc. It enables you to use a custom domain with Application Gateway's TLS certificate management capability to provide a secure connection to your clients and access any backend service. Additionally, it offers a single endpoint for all your clients as a single Application Gateway resource can support Layer 7 (HTTP/S) to Layer 4 (TCP and TLS) protocols.
The feature is available for Standard V2 and Web Application Firewall V2 SKUs. Get started by visiting the documentation.