Per Wikipedia [1], legal proceedings started in 2018, and the actual court hearing stage happened over the past month. It's not clear how much of that time was waiting for whatever reason, versus ongoing back-and-forth motions and such.
Plus COVID killed the legal system for 2 years. I just went to court on a case yesterday and the judge brought up the docket and we realized the last time we filed anything was 2019.
[1] https://en.wikipedia.org/wiki/Shape_of_You#Copyright_trial