Telemetry Items available in OSD

I am coming over from INAV, was mostly expecting a way more options and control with AP, almost like I could do almost anything, which I am seeing already, however there are a few things that actually seem more limited than INAV, but I am probably just not understanding the software or missing something.

The available OSD options seem sort of limited. I’ve always used “mAh remaining” in INAV for battery monitoring, that doesn’t seem to be an option in AP, as well as a few others that I would think would be there, is there a way to add these somehow?

Also, INAV has the “programming” tab to program simple logic and use it to set global variables and control things, is there something similar in AP? That seems like a huge feature.