How can I publish a module to header-1 position on JA Flix?
It does not show among the available positions for the module and even if I type its name it does not show.
By default, Header 1 in JA Flix is a block, not module position. This block will show various position like logo, megamenu, off-canvas, head-search
If you want to have a 'header-1' position, you can simply create a new position as you wish.