How do you progress the atlas? I got the 4 voidstones, and conqueror maps, and no way to use them.

I am completely lost on how to progress the atlas past the point of having the 4 watchstones and did a few bosses, but now I am completely locked out of being able to do anything with the conqueror map.

Veritania, Drox, the constrictor....

no idea at all on how to do anything with these.
They drop, but seems to be no way for me to actually use them.

What on earth am I missing? It's hard to believe this new atlas could be this janky - so I feel like there is something I am completely just not seeing.

I just find it incredibly frustrating that I have maps, they are dropping, and yet I just cannot see any way to use them....

Elder Guardian maps and Conqueror maps should be the same as they've always been. They don't have their own unique map layout (as compared to Shaper Guardians); they replace or appear after a normal map's boss.

Try using them in to open whatever normal map you feel like.

That was it. I knew I was overlooking something.

It feels like a bad design, because they make such a big deal of hiding all high end content behind the voidstones, so once you get access to the boss maps you expect they too are gated behind something.