No Tonalic in Cubase 15.0.30 for me

so many tutorials how to use it. awesome.

but how do we get it to appear in Cubase ? where are those tutorials ?

Have a look at the announcement:

Open your MySteinberg account, redeem your voucher and follow the instructions. You have to create a Celemony account in the process. Just follow the prompts, it’s pretty easy.