Package manager for yocto OS

Hello,

We have setup,compile and build yocto OS and flash it to SD card for NVIDIA Jetson nano board as given in doc (Yocto Support for NVIDIA Jetson Platforms - Setting up Yocto)

I am unable to find package manager apt ,dpkg or ipkg in it.
Can you please guide us for package manager for yocto OS on jetson nano board.