Hey Kubius, thanks for the mods!

I installed this in my existing save and don't see any asteroid chunks or sea deposits. I tried using the terrain regeneration tool mod, with no luck.

Is there a way to get it to work with an existing save?

After some brief testing, it appears that even in freshly-generated chunks (not just Regenerate Terrain refreshed ones), an Aquilo surface created without Frozen Reaches is permanently "stuck" with no deposits generating. I haven't quite pinned down why this would be, but I have verified that deleting the entire surface using the editor then returning to the planet (tested by creating the surface in editor, but dropping to the planet should work) will allow shattered meteor deposit generation.

Appreciate the info!

I was contemplating starting from scratch anyways seeing as I also installed Brevven's BZ mods.

So ... Aquilo is no more - https://www.youtube.com/watch?v=og5mNf3IqLQ

A bit late to the topic...
If the planet was generated before adding this mod, because you landed there or used the editor's generate planet feature the deposits will not spawn.
This can be verified by using the editor's "Edit map gen settings" feature: Shattered meteor will be unchecked.
While it would seem natural that checking this (and adjusting the sliders) would help, it does not. These settings are ignored.
What Kubius' wrote is correct: Deleting the surface and recreating will fix this.

Digging deeper I can at least tell you what the difference is:
A fresh planet will have game.surfaces.aquilo.map_gen_settings.autoplace_controls['meteor-ore'] set.
This setting can also be modified by "Edit map gen settings."
A fresh planet will also have game.surfaces.aquilo.map_gen_settings.autoplace_settings.entity.settings['meteor-ore'] set.
This setting will not be modified by "Edit map gen settings."
I guess, but could not verify, that changing both settings for an existing surface could lead to new chunks containing meteor-ore.