I find this after installation of MM 2022, I never saw it before but its cool.
Yes, we updated the system we use for Help and it has a new look and feel. Glad you like it :)
I like the new-look help pages but I'm disappointed that you seem to have dropped the comprehensive downloadable PDF guide that came with previous versions. This is an invaluable resource, especially if you have to work offline for any reason.
Also, have you considered publishing an HTML5 mind map version of the help guide? Just a thought :)