The ones I saw didn't actually cut the curb - they had arms that held out the form and "built" them in place. I was surprised, as the still-recent but earlier curb cuts had very obvious examples of actual cuts. It was similar to this, perhaps https://www.curbmachines.com

I wonder if you could just ignore ignore settlement by provisioning for hydraulic slab jacking instead?

Include a built channel for injecting hydraulic grout a few months later once the settlements happened to correct it out.