HELP with ML-agent "getting-started.md" there is no ML-agent package!

i try following youtube video most recent 9 month ago and good one 2 years ago.
i cant follow them because im stuck at the same place as “getting-started.md”
its where there is no ML-Agents package on package manager i checked the preview option too.

what happen? is it because we are in the future?
that there is no need ML-Agent package even the “getting-started.md” stated we need to use the package?

i follow installation carefully, i updated all of them the hub, unity version for the project, the visual studio, python, and other at installation guide this too…

ah damn…
turn out you cant find it on package manager…
my post above install that package locally

i dont know why they didn update the guide .md
even all youtube video using that package manager option.

they should update the guide straight to step 4.
noob like me can give up easily