Ultraverse
The Ultraverse is the name to this greater construct which can be understood to encompass all universes and all possible realities across all possible times.
Justification
Ultimately, the question of how many universes there are is judged here to be a Verum Ex Logica question which given Doctrina Ultra considerations leans in favor of a logical multiplicity.
Therefore, unless empirical evidence is found that prohibits reality from emerging (despite reality having already come to be in our present instance), then it's reemergence should be understood as more likely than it's ceaseless, never ending, and omnipresent dearth across all possible space and time.
Infinite in Nature
The Ultraverse as a concept is understood to encompass all universes, all multiverses, and all realities.
While the Ultraverse' is intended as a term to refer to all universes and all realities, the logic of Doctrina Ultra (instrumental to the presumption of the Ultraverse to begin with) would suggest it is logical to presume there should be infinite Ultraverses.
This is the correct presumption according to Doctrina Ultra and thus a more refined way to understand the Ultraverse is that it is everything in all ways everything unfolds. There are infinite of these everythings and they are all exactly equivalent
See Also
➤ Infinite Journey: Doctrina Ultra, Verum Ex Logica
➤ Wikipedia: Multiverse, Reality