I’m not sure. All I know is that Proxmox doesn’t recommend using Docker in LXCs. It seems Proxmox has much more control over the internals of the container and can break stuff.
https://pve.proxmox.com/wiki/Linux_Container
If you want to run application containers, for example, Docker images, it is recommended that you run them inside a Proxmox QEMU VM. This will give you all the advantages of application containerization, while also providing the benefits that VMs offer, such as strong isolation from the host and the ability to live-migrate, which otherwise isn’t possible with containers.
These photos for some reason made me go look up an old MTG card from my childhood.