Hi A. R. Choudhury,
For opening up those social links in the new tab, can you visit Appearance->Menus and then edit the social menu created for your site? Now, while editing the menu, in the top right corner, you will find the Screen Options section, so, just click on this button and then the checkbox option of Link Target will arrive under the Show advanced menu properties option there. Now, after putting the checkmark on this option, you will have the Open link in a new tab checkbox option under each of the menu created. So, just put the checkmark on this checkbox option and save the changes and it will all work out as expected.
If you like the theme and appreciate the work put on the theme, then, you can help by rating this theme through this link here: https://wordpress.org/support/view/theme-reviews/the-newsmag