Question Theme builder header not showing on website

[mmr]

Hello,
I have crated a header with the Theme builder ( I am using Astra as Theme).
When I preview is on the Theme builder header section I can only see the Header and then a default page underneath but not the Home page that I have created previously. (see attachment 1)
If I want to see the page with the header I have to leave the Theme builder, go back to the WP Dashboard and preview it from there (see attahment 2)
Is it normal?
Thanks in advance for your help

 

[Mattia]

Click on setting (bottom left of the page) and in Preview select which page you want to preview

 

[mmr]

Thanks a lot! I appreciate your help