Hello,

You have added logo, menu and cart elements in the main header for mobile header. If you increase the size of the logo the other elements are not showing because there is not enough space to adjust these.

You can add the logo in the main header or add another element in the top header or bottom header.
But I have increase the logo width the logo width change fine:

Screenshot for clarification:
https://postimg.cc/gnwq6cCp

If the overall image aspect ratio is larger than the header row height, further logo width increase will be ignored.

Best Regards.