Incus is a virtual machine platform, similar to Proxmox, but with some big upsides, like being packaged on Debian and Ubuntu as well, and more features.
Incus was forked from LXD after Canonical implemented a Contributor License Agreement, allowing them to distribute LXD as proprietary software.
This youtuber, Zabbly, is the primary developer of Incus, and they livestream lots of their work on youtube.
I will put in the time and effort to migrate to this from proxmox eventually.