I'm doing a Krastorio 2 run. I loaded the mod in to an existing map.

No conflicts or issues, but it also doesn't appear to be doing anything. Is this an item compatibility thing?

I tested it and it seems to work fine for me.

https://i.imgur.com/ArZn9Fj.png

Thanks for looking in to it, I don't know what the deal is. I had to put down ghosts for concrete manually.

Is there a way to adjust the creep speed?

It can take a few minutes to completely fill a single roboport with concrete, but this is assuming you have tons of idle robots and tons of concrete in your logistic network. It's expected that bot availability/concrete won't be plentiful so it should take hours to concreep your base. Which helps because the process of creating too many ghosts can lag the game.