I'm not sure if it's a bug or it's intentional, but I don't see additional links on mobile devices.
My forum is hosted on a subdomain https://discuss.digitalkube.com
Site's homepage address is https://www.digitalkube.com
I added home address as an additional header link on the forum so that people can easily open site's home through the forum.
Since the additional header links are not showing up on mobile devices, it's not possible for someone to go to my site's homepage.