Remove generated by GeneratePress documentation not working for me

1. I found this documentation but do not seem to have the Copyright and in the same place as in my Footer do not have all these options. https://docs.generatepress.com/article/changing-the-copyright-message/#using-a-function
2. I do not have this footer in the other pages but yes in the thankyou page. How can erase this part.

The page I need help with: [log in to see the link]