CR-V 2016 to 2022

I have a 2016 Crv Lx and this came up on my dashboard (i). What is it indicating ?

2016 Honda CRV 1.6 dtec 9 speed auto EX. My car had been left at the Meet & Greet parking at East Mids airport for 2 weeks. On collection yesterday they said the car battery was flat. The very helpful meet & greet team drove me up to the parking area to try starting it myself. When i tried to start the car, the brake pedal wouldnt push down as if it was locked/disabled and while trying to press the pedal down along with the engine Start button, nothing appeared to light up on the dash board. I tried this a few times and not sure what i did but out of the blue it suddenly lit up the dashboard and started and i might add, plenty of power in the battery as it didnt…