Expanded nav bar for social links

Hi all!

I am seeking the right code so that I can expand my navigation bar to add a series of links in a sleek and discreet way, just like you will find at: https://www.cigarettesaftersex.com/records-index

Click the three dots on the far right of their nav bar to see what I mean. Is there a simple code injection to achieve that?

Thanks!

Clive