Ambient light in HDRP


I am using Unity 2021.3.22, HDRP pipeline. I am new to Unity.
I am just looking for the ambient light.
There is nothing in Window/Rendering/Light/Environment
And I couldn’t find it in project settings.

Also, what’s the way prevent it from affecting indoor? I’d like to have a pitch black room.

And finally, how to dynamically control the ambient light to have a day/night cycle or to allow the player to change the time of day.

Thank you!

if someone has the same questions, the answers are here: