They’re not gonna have a Windows situation with 2 settings apps, and they have no good reason to revert their changes, since it would be against the unification of the interface across iOS and macOS they’ve been pushing hard for years.
You can upgrade to Monterey at least. That’s where I’ll be staying until they introduce a feature worth upgrading for or they stop security patches for the OS.
Well, by trying to unify iOS and MacOS they completely ruined the perfectly fine system settings app, and replaced it with something absolutely dreadful, slow and unintuitive.