It is possible that you have lost some keywords. At the same time other terms may have made the top 10
But it doesn't look bad to me.at all. Your ctr is also excellent compared to my site.
What do you think about the covid19 do you think it is because of this that is why the clicks and impressions drop?
What is your site's niche?
A lot of domains/niches were hit by COVID and people's reluctance to search (or spend money) of some things.
Here's some of them: https://www.wordstream.com/blog/ws/2020/03/18/covid-19-google-ads-data