I'm not sure what you're asking, particularly about the top green panel. My green bar moves depending upon the regenerative braking, so a hard stop will fill the 'bar', but that isn't a 1:1 ratio with the battery itself - it's showing that energy is recharging the battery.
In my '22 hybrid touring the battery level goes from about 1/4 at the bottom to completely full, depending upon what I'm doing. The battery charge level seems to float between 1/4 and 3/4 full during normal driving; slow braking after going freeway speeds will usually top it off.