@Joshless We literally see on screen the Red Miles spreading throughout the frog and destroying entire galaxies. I think the destruction of the Genesis Frog only took "millions of years" relative to the fact that Bec Noir did it from inside the Furthest Ring, wherein time and space are warped and hard to navigate. Also, he left behind an arm, which is probably where the Alpha Kids iteration of the universe was located until the Red Miles seeped into their reality.

Also, this is even more consistent given what the Green Sun (which is something we know for a fact is powering Bec Noir. Just. Obviously) is created from the destroyed matter of TWO entire Genesis Frogs, and even without that we know for a fact that it's just twice the mass of the universe. Bec Noir being Multiversal+ is NOT an outlier, nor are the Red Miles that we SEE on screen destroying the Genesis Frog.