The article lists settings to change on Android 14 and iOS 17.
According to the author:
Recommended setting changes reduce the amount of data submitted to device manufacturers, cell carriers, or app developers and improve device security against common threats, such as those posed by nosy people who find the device unattended or by common malware.
By enabling all of these settings, you are significantly reducing the amount of tracking and data collection these devices perform, but keep in mind that you are not completely eliminating it.
Note that some of the android settings are rather sweeping in how they change the usability of the device, like disabling nearby share by default or removing the notification history.
If your only goal is an absolutely minimised amount of connectivity then they’re good to follow, but otherwise check list but selectively apply only what you find acceptable for your use case.