Battery health

Parts and service history

With iOS 15.2 and later and iPhone XR, iPhone XS models, and later—including iPhone SE (2nd and 3rd generation)—you can go to Settings > General > About for the parts and service history of your iPhone. You can also find out if the battery has been replaced. If the replacement was done using genuine Apple parts and processes, "Genuine Apple Part" will appear next to Battery.

The link on top of this page which you had visited, before posting this question here, is shown under the "Related Article” gives me an indication that you can't see the battery health because it isn't a genuine battery.