Why are there not more companies disclosing the amount of waste they recycle?

I would have thought that tracking the amount of waste recycled would be standard for companies that take sustainability reporting seriously. I'm surprised to see this is often not reported. Does anyone have any idea why this is the case? Is it harder to measure the amount of waste that goes for recycling than to measure the total amount of waste generated for some reason? Could it be omitted because the figure is low and the companies who don't report this tend not to recycle much of their waste? Are there industries where waste recycling is impractical?