It is possible to separate virtual machines on different hosts using the „Anti-Affinity Rule„.
To do this, click on any virtual machine.
Go to the Affinity Rule tab.
And select the New option next to „Anti-Affinity Rule„.
In the next window, enter a name for the rule and assign the machines to which you want it to apply.
After configuring the rule, the virtual machines will run on separate virtualization hosts.