VMware has released ESXi for ARM a while ago. This makes it possible to run ESXi on a Raspberry Pi 4 (and meanwhile on other ARM devices too, the support for additional ARM devices is about to grow).
As already requested here multiple times by different users I would like to set the feature request to support HAOS for VMware ESXi ARM in the future.
Having HAOS OVA for ESXi for ARM is quite interesting, as it opens a new world of management for ARM Devices.
Having the possibility to run a Highly Available Cluster with Raspberry Pi and ESXi supports a cheap entry-level solution for Home Services, having the possibility to run multiple ARM systems such as Home Assistant, PiHole, NodeRed, and many others on a raspberry and have features such as snapshots, NAS storage, VM Backups, etc.
Some bootloader work has to be done on the current image to support UEFI boot (required by ESXi-ARM) and be able to boot HAOS on a VM.