Qusq Pro – Where to change Comments for placeholders and Previous / Next Project

Hi,

I’m a developer.
We bought your Qusq Pro WordPress theme for this site – iriska-cake.top

I did not find where I can change the title, placeholder values in the comment post form – https://iriska-cake.top/test/

And I did not find where to change the “next project / previous project” on this page – https://iriska-cake.top/portfolio/prazdnichnye-torty/ e.g.

Will you help me?