Searching for an "8227l-demo Android 8.1 Go update" leads a user down a rabbit hole of dubious Russian forums (4pda), massive Google Drive links, and YouTube tutorials with broken links. Why is this so difficult?
Some units advertised as having 2GB RAM or higher Android versions (like Android 12) may actually be running a "faked" version of Android 8.1 Go or even Android 6 internally. AliExpress Update & Installation Experience Manual Update Process: 8227l-demo android 8.1go update