Here is a screenshot of some of the top keywords movement after 6 months. The Diff is a difference in rankings and Vol is the monthly sarch volume for a target keyword in Ireland. (keywords are hiden for privacy reasons)
The business is experiencing a great revenue growth compared to last year. With the new normal being online, e-commerce is here to stay and digital marketing is its blood.
The site finally recovered from the December algorithm penalty. The rankings have improved a lot compared to the start, as you saw on the screenshot.
The moral of the story is to avoid penalties by having an SEO person audit the site in detail. Don't try easy ranking manipulations.