Hello,
1) Use HTML block element to show it in the desktop header and mobile header https://prnt.sc/115vq97
2) Contact WPML support about this. It does not display even with the default theme https://prnt.sc/115w11d https://prnt.sc/115w1kf
3) Enable page builder for the static blocks https://www.8theme.com/documentation/xstore/support/static-blocks/
Regards