You have a Hyper-V or ESX(i) host and back up its virtual machines with agentless backup, using a Agent for VMware (Windows or Virtual Appliance) or Agent for Hyper-V.
You want to check backup activities. You find the protected virtual machine in the list of devices, but notice, that the list of activities is empty.
Limitation of the current product design.
Activities are shown in the activities tab of the Hyper-V host machine or the machine which runs Agent for VMware. Check the plan status on this machine:
Alternatively, apply backup plans one per VM, so each VM has its own backup plan.