The same thing happened to me as well. In April this year, I started this medium blog and for a few days it went in an upward trajectory, but after I posted a few articles, my blog stopped from getting in the search results of any search engine.

The problem solved only after changing my domain but even then, my daily viewcount was slashed to 1/5th of what it used to be in April. Even now, when I got more followers and subscribers, I don't get many views whether I post consistently or not doesn't matter.

I just don't know anymore what works on medium and what not, since many new writers get more engagement and views with fewer followers than mine. I am literally thinking to abandon this blog and work on something new entirely.