iWork was dropped back when Mavericks came out, iirc. Need to move to the newer free apps.
Seem to recall, in the past, could get the new apps if you had an iPhone or iPad. "Purchase" the iOS version, then the Mac version would show in the App Store as well, and will be available on all platforms going forward.
I found the solution:
I installed unsupported Mac OS on my MBP, purchased those in the app store, because those are free, back to my supported system, and in my El Capitn now I can download from App Store