Much of the filming that had been done needed to have dinosaurs digitally created, and some some of the work that would otherwise not have begun until now, the post-production process, actually got underway early.
Jurassic World: Dominion was only one of many movies that were forced to shutdown production after getting underway when it became clear that the global pandemic was becoming just that.
Although, Colin Trevorrow revealed that the movie didn’t entirely stop in its tracks.