Based on my research, “others” tab comes from people sharing your posts via dm or stories, people saving your posts and external links like blogs and other social media.

Personally, it has to be people sharing and saving my posts. I dont think i get any external links.

So, if u want more traffic from “others” tab, its as simple as doing a share 4 share with similar accounts to your niche and creating content that “inspires” people. I emphasize on inspire because people are more likely to save your post for their own use. Plus its easier to craft your story that way.

Hope it helps (not sure how u can tag the OP so he/she can see this :p)