Not sure, it’s not been proposed on our projects before. Most likely, that means it’s not cheaper than geofoam or fill.
I read up on it when we did electronics for concrete mixers.
The chemistry of foam concrete is a very inexact science, bordering on being "possible to get right through talent only"
Very little literature on it, and proprietary foaming agents all come from Eastern Europe with zero info, or instructions beyond "mix this stuff with water 100:1, and pray"