Why not create a new planet with a unique progression system? It could be similar to Cerys, where cargo pods are unavailable in the early stages.

I got multiple requests to add compatibility for Cerys with my modpack, and I also personally wanted to do so.

That said I have been considering making a planet myself at some point! I have some ideas I'd love to tackle eventually, but it'll be further down the line, gotta slow mod development down a bit to do life stuff. But I specifically saw your custom starmaps and have considered using one of them when I do so :)

I'd also been talking directly with thesixthroc about compatibility, since compatibility was asked about on the Cerys discord