The term 'Pod(s)' should added to the horizontal pod autoscaler pod donut label so it's like the other pod donut labels. I have attached screenshots to show what the pod donut with horizontal pod autoscaler attached looks like in comparison to a regular pod donut.
verified on 4.8.0-0.nightly-2021-02-21-102854
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (Moderate: OpenShift Container Platform 4.8.2 bug fix and security update), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2021:2438