There's more than 6 timelines lmao. There's a likely countless amount, which is implied in the series with visuals, albeit it's never blatantly stated. They just showed 6.
In other words countless amount of Zenos.I still don't see how Zeno is 2-C, especially since he never destroyed multiple space-time continuums
This seems to be running on some kind of misinterpretation as to how time-spaces in DB even work. If I were to explain it, it would be like each universe in DB having space and time
thing is, every single thing contradicts the "12 universes" having separate space-time. As I showed in the OP. Whis stated he can travel to Zeno's palace in 2 days, yet he can't even dream of traveling to trunks space-time by his own self. Goku Black stated a path of space-time was created means between the two timelines. Each timeline has a Zeno, so no it does not mean just "universe 7", since if you were to cross the other path where Goku Black came from you would end up in a space-time with another set of "12 universes"