To create a load balancing rule that will load balance HTTPS traffic between VM1 and VM2, you need to create two additional load balance resources: a frontend IP address and a health probe.

A frontend IP address is the IP address that the clients use to access the load balancer. It can be either public or private, depending on the type of load balancer.A frontend IP address is required for any load balancing rule1.

A health probe is used to monitor the health and availability of the backend instances. It can be either TCP, HTTP, or HTTPS, depending on the protocol of the load balancing rule.A health probe is required for any load balancing rule1.

A backend pool is a group of backend instances that receive the traffic from the load balancer. You already have a backend pool that contains VM1 and VM2, so you don't need to create another one.

An inbound NAT rule is used to forward traffic from a specific port on the frontend IP address to a specific port on a backend instance.It's not required for a load balancing rule, but it can be used to access individual instances for troubleshooting or maintenance purposes1.

A virtual network is a logical isolation of Azure resources within a region.It's not a load balance resource, but it's required for creating an internal load balancer or connecting virtual machines to a load balancer2.