I think I get the gist of what you're saying...but I keep finding "single" sites that are giving model year by model year information. Just like the link I posted previously (if you click it it takes you to a single site that lists the specs and info for multiple model years.
Here's another...
edmunds.com where I looked up info starting with the 2016 model year...and there are direct links to 2017, 2018, 2019, & 2020, etc. The pic below is only a screen shot of the top of the page...there's more info as you scroll down (if you click the link below):
https://www.edmunds.com/bmw/7-series/2016/