After upgrading to Qubes 4.1-rc1 I could only find Disposable: whonix-ws-16-dvm. I tried to make one by making a VM based on debian-11-dvm but it would only allowing spanning a single VM instead of having as many VMs as you want with such names as disp-3413, disp-1341, …etc.
I think I should have phrased my question better (my Disposable: whonix-ws-16-dvm is absolutely fine), what I want is how to create a non-named disposable VM (or a regular disposable). I already have the debian-11-dvm and fedora-34-dvm templates and the best I could do was to make a named disposable:
A type of disposable given a permanent name that continues to exist even after it is shut down and can be restarted again. Like a regular disposable, a named disposable has no persistent state: Any changes made are lost when it is shut down.
Only one instance of a named disposable can run at a time.
Like a regular disposable, a named disposable always has the same state when it starts, namely that of the disposable template on which it is based.
Technical note: Named disposables are useful for certain service qubes, where the combination of persistent device assignment and ephemeral qube state is desirable.