While making the compat layer for this mod, I noticed that having methane vents on gleba could be an interesting setting. That is the planet where you won't really have normal access to petroleum gas without going to other planets, plus methane is an organic compound so it can fit.
https://mods.factorio.com/mod/alternative-intermediates

Sry for the late reply, I saw your suggestion back then but I was very busy and forgot about it.

While the idea of methane vents would fit the biological theme of gleba, I think adding a depleting resource besides stone does not align with the concept of regrowing resources for me. Maybe methane from spoilage, a fruit or an intermediate product from gleba could work. I will take a closer look once I'm on gleba in my current run.

Anyway thanks for the suggestion, it's always good to get new input to think about!