Both are explained, one is to press a button and the other is to deactivate the music and press the capybara
It says it at the beginning of the guide

Its just for kuko achievment not the hidden one right?

At the beginning it is explained how to get the two extra achievements, just do that

I can still see 1 hidden achievement as remaining

Thanks for the guide!

Thanks for the guide, it was very helpful!

thank you! great guide

Look at store pages, any game that lists "profile features limited" can not be displayed on your profile or have its achievements displayed. This restriction remains on all games until they sell enough to be considered popular. The exact number needed to sell is not public.

The game is restricted that's why the achievements are not shown on the profile