It's extremely easy to add any dimension to the stack! Here's how it's done.

First, all dimensions need the world heights, which can be found by being in a dimension and typing

/spd.height

In this case, the Aether gives you -1 and 256

image.png

Next, you’ll need the dimension’s exact name, not The Aether, but aether:the_aether. You find out a dimension’s name by typing in the command

/execute in

And then pres tab to see a complete list of all dimensions

image.png

To format this, you need dimension*min!max?, or

aether:the_aether*-1!256?

Once you put them all in a stack, MAKE SURE YOU END WITH A DOLLAR SIGN ($)

aether:the_aether*-1!256?
minecraft:overworld*-65!320?
infinite_abyss:first_layer*-1!128?
infinite_abyss:second_layer*-1!128?
minecraft:the_nether*-1!128$