ProBuilder Install, Not Seeing it, please help

Hi, I just learned about ProBuilder, and I'm trying to install it, but I'm following the install instruction, and it's not showing up in the package manager search at all.

it doesn't appear to be available in the asset store, there's nothing in the guides that says what to do if it doesn't appear in search, I'm at the end of my rope after 6 hours of searching.

if it helps, I'm using Unity Version: 2020.3.15f2 (Personal Edition)

is it that I have a conflicting version to not be able to even download ProBuilder, or is it that ProBuilder isn't even available anymore since everything has gone to $#!+ since the pandemic

 

nevermind, I feel like an idiot but all I had to do was use the right search filter in the package manager.

Guh!!! I'M SUCH AN IDIOT!!!!!