Scaling Edge on AKS

We have Edge on K3s at present and as we have hundreds of databases to sync we've hit capacity limits.  We have setup an Azure Kubernetes Cluster in our dev environment and migrated our dev Edge site.  The nodepool has autoscaling enabled, but Edge never seems to prompt it to scale.  Even if I submit 100 jobs at once it sticks to the initial node capacity.  Is there any way to change this behaviour?  Collibra's Edge FAQ indicates Edge sites are horizontally scalable on AKS but doesn't give any instructions to make this happen.