S mode does allow you to turn it off, so it’s more like a hobbled version of home.
The computer is as bad as one I saw several years ago with 64g emmc and “Quad core processor.” not a quad core, it was literally the name that showed in system. It did have 4 cores: at 400Mhz, boosting to 1.1Ghz. Buyer changed their mind and we couldn’t give it away.
You’re not safe there either, they had almost the same issue on the Linux version of the product a few months ago.