Cockpit-machines how to extend VM management?

Question

Debian

Good time!
Just today I came across the Cockpit control system.
Installed. Tried.
Added cockpit-machines...
And somehow everything is thin, but this tool is positioned as a replacement for virt-manager.
You can create a VM, but the choice of settings is somehow very meager-poor.
In the created VM, in general, only the number of cores can be changed. Even changing the size of the memory does not allow.
Perhaps you need to add some additional plugins for advanced management of creating / editing VMs, you also need the ability to create / manage snapshots.
By the way, I saw a screenshot of the cockpit and there is a snapshot item, but I don’t have it.
In general, at the moment, cockpit-machines is able to replace virt-manager, or is it still a crude flaw?