Hi there,
They should all be in one line by default.
The issue is that the site title is quite long and font size is a bit large so there isn’t quite enough room for all of them to be on the same line on a smaller mobile screen.
There are couple of options:
– Removing the mobile menu label might give you enough room:
https://docs.generatepress.com/article/mobile-menu-label/
– Set the site title smaller on mobile:
https://www.screencast.com/t/1hWpNJUHH
Let me know if this helps ๐