Selfhosted Openrouteservice -> add population calculation

Hey together,

I want to calculation the population for isochrones on my selfhosted openrouteservice. What modifications do I have to do? I couldnt find an option on the ors-config.json. (Configuration | openrouteservice documentation)

What format does the openrouteservice need for the GHSL data (Global Human Settlement - Download - European Commission)?

Is it similar to the elevation?

Thanks for your help.