You need to link your Path of Exile account to your Twitch account. This can be done through the official Path of Exile website. Then you either need to be on the official Path of Exile ladder or log in with your Path of Exile account on this site.

Listing is based on streaming activity: we check which channels are live in the Path of Exile and Path of Exile 2 categories on Twitch and how many viewers they have. Streaming regularly with an audience gets you listed, and a large audience gets you listed faster. Follower count is not used.