I was laid off in the summer of 2020 and elected COBRA, but a few months later dropped it because I couldn’t afford the premium. Can I get this subsidy now?

Yes. Under the law, people who previously elected COBRA, then lapsed coverage but would otherwise still be eligible for COBRA, can elect for their COBRA coverage to resume, starting on April 1, 2021. They can get the COBRA premium subsidy for 6 months or until their COBRA coverage ends, whichever comes first.