I am very sorry read about this. It feels like the algorithm blacklisted your account. Maybe you create a ticket and ask the support team to get it checked. It happened to me in 2020 when my stories sometimes got zero views when I had around 5000 followers but then a few months after my complaint they started getting new readers. But I ensure to follow the distribution rules. Sometime breaking one minor rule can stop the algo to distribute stories. The most important points are title or subtitle sounding clickbaity to the algo. Using all scientific terms in titles. Or too many links to external sources as I sometimes do.

I am glad you started Substack. Congratulations. You have massive amount of content which you can repurpose and start building your audience there. I will guide our writers through this pub so thank you for being a writer and editor for it. It will allow you to collaborate with other writers. Recommendations are very important on Substack.