Why is the 'Dragon Ball' multiverse only comprised of 12 universes

Did Android 17 wish back all 18 Universes? (& 9 more Dragon Ball Super questions left unanswered

Dragon Ball Multiverse EXPLAINED!

Universe 12, Dragon Ball Multiverse Wiki

Why is the 'Dragon Ball' multiverse only comprised of 12 universes? - Quora

Mirai” Universes: 12, 14, 15 The original timeline - Chapter 71, Page 1655 - DBMultiverse

Dragon Ball Gods & Cosmos Guide

In the Tornament of power why did only 8 universe out of 12 universe's participate? - Quora

Mirai” Universes: 12, 14, 15 The original timeline - Chapter 71, Page 1657 - DBMultiverse

Which multiverse is bigger, DC or DBS? - Quora

Every universe in Dragon Ball, ranked from weakest to strongest

Mirai” Universes: 12, 14, 15 The original timeline - Chapter 71, Page 1654 - DBMultiverse

Mirai” Universes: 12, 14, 15 The original timeline - Chapter 71, Page 1636 - DBMultiverse

Universe 2, Dragon Ball Multiverse Wiki