Self-leveling products have been out for years now, so the majority of contractors understand that it isn’t a product that you pour out in the middle of a floor and the material will self-level all by itself. I still get phone calls now and then where the installer poured it in the center of the room and left it to self-level only to come back and see a mound of self-leveler that has hardened.
I’m also still inspecting installations where subfloor flatness issues were not addressed prior to the installation of flooring products and have led to claims that end up costing thousands of dollars.