Does anyone know why my map that says contains 17 more abysses and things only has 2 abysses and no monsters to fight?

A good layout for the campaign isn't quite the same as a good layout for league mechanics. Thereś just no space for anything on this one.

It might just be a bug but the map also heavily influences the number of abysses that can spawn. That looks like Molten Vault(?), which is one of the worst maps for abyss as the narrow layout can stop the abysses from spawning properly.

Because of the layout. Molten vault is just awful. The corridors are way too small for mechanics to spawn into them. The game tries to spawn them, sees they dont fit, and just skips it. And that's basically this entire map.

No monsters is because of abyss overrun. It basically replaces all the natural monsters with abysses. Or at least tries to. And fails on layouts like that. Unfortunate. Next time you spawn it on a savannah or sandspit and enjoy the density.

There are maps that kills abyss overruns, molten lava is included and I think myre to name a few.

Sun temple sucks as well

Cause it's molten whatever. I never run this map

Yes

I've had a map that was meant to be overrun naturally, I've used two Abby's tablets with extra pits and a chance to have another extra pits, entered the map and it has 3! Pits all together it was oasis or deserted so big maps with OK layout

Because GGG thinks it is fun for players to memorize every single map type and the hidden property of which ones will not generate any mechanic whatsoever.