could you please tell me how can I stretch the header?? Nav Menu and logo

Hi there,

Any chance you can link us to the page in question?

You can use the private information field:
https://docs.generatepress.com/article/using-the-premium-support-forum/#private-information

Let me know :)

I have added the link below.

Can you try setting the header widths to full in the customizer?
https://docs.generatepress.com/article/header-layout/