Hello! I'd be really keen to know what other activity you have running in parallel to anything on Itch. How are you leveraging your own studio channels? Where are your cross-promoting? What publications, groups and communities are you introducing your game to? Have you conducted any giveaways? Have you opted into the Itch partner program? Have you blasted out keys via Keymailer?
As No Time To Play mentions, Itch is just a store here (albeit one with very good community and social integrations). You need to push people here.
I put together this very top-level marketing support post a while back - perhaps you'll find it helpful.
If you have specific questions on anything here, I'm always happy to chat and offer specific recommendations :)