Meh, the effect of COVID on the economy was pretty specific. You've got a drop in commuters, and a lot of office space going empty and not using a lot of energy. But now people are staying home all day, so they're still using electricity, just in their homes and not the office. According to the article, the demand for electricity only dropped 2%, the 10% drop in power plant emissions was largely due to the continued transition to renewables. And while a lot of people stopped commuting and traveling, there was plenty of shipping (including a big bump in deliveries) which is a substantial source of emissions.
I'm still optimistic. Just replacing coal with renewable power would put emission levels back to like the 1960s (maybe 1970s, trying to find that damn statistic), and that's likely to happen in the US in a few decades just by market forces.