Thanks for using our theme.
1) Menu, that can be selected in settings of Theme Options > Header builder > All Department, should be created manually via Appearance > Menus.
Submit your request here – https://www.8theme.com/taskboard/ If this request takes votes also from other customers then our developers will implement this.
2) What element do you use? Could you provide a screenshot? Here is an example – https://prnt.sc/1vt4qub (Theme Options > Header builder > Socials). Also, enable the Telegram in Theme Options > Social sharing > Select Socials You Want To Show.