Ultima answered something similar.
Basically, alternate earths that are treated as carbon-copies of Earth-616 with some different events are assumed to have the same cosmology, especially
What If? universes and direct branches of 616. Non-comic spin-off realities like the MCU or video game/animated series universes are assumed not to have the same cosmology as 616. Same goes with timelines whose cosmologies are depicted differently like Earth-1610. Otherwise, you'd need statements for an alternate timeline being similar to 616 physically. Personally, I'd consider any alternate Universe similar to Earth-616 by default since that's how MWI works, as long as the spin-off takes place solely in comics.