Ultraverse
The Ultraverse is the name for 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 its reemergence should be understood as more likely than its 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 referring to all universes and all realities, the logic of Doctrina Ultra (instrumental to the presumption of the Ultraverse to begin with) would suggest that one should presume there are infinitely many Ultraverses.
This is the correct presumption according to Doctrina Ultra. Thus, a more refined way to understand the Ultraverse is as everything, in all the ways everything unfolds. There are infinitely many of these everythings and they are all exactly equivalent.
See Also
➤ Infinite Journey: Doctrina Ultra, Verum Ex Logica
➤ Wikipedia: Multiverse, Reality