So the std licens doesnt give you access to custom dashboards, but it does give you access to create a view, this will be the best option for you.
If you want a report there is "Cluster Capacity Risk Forecast", but the values are in percent and not VMs left.
You can create a view like this:
The output will be like this, but you can modify as needed:
Note the "Metric label" can be changed to a more fitting description of the colum.
Also note the under "Content"->"Costum Profile" you can create your on profiles which can be part of the policy. The custom profile gives you the option to better decide how this VMs left shall be calculated, ie. based of allocation or demand or both. Fx. if you always deploy as a default 8vCpu and 16Gb ram to you SQL VMs you can create a profile spicifying that, so that on SQL clusters you know how many more you can deploy.