Is there any possible way to generate Biomass in a pacifist run, because the Biomass generation building is locked behind military science, which you need Biomass for.

Edit: Creep should be Biomass.

You have an option to toggle "peaceful mod" in world gen mod settings, i do believe that is what you are looking for :)

That's not exactly what I was looking for, but thanks to your suggestion, I was able to change the military science recipe to the base version, which can be done in a pacifist run. Thank you!

There is a way to create biomass from matter, unless that recipe was changed (late game, so your advanced power armor will have to wait). At least that's the way I did it a few months ago.