After releasing a new the plethora of Star Wars novels and comic books published over the same amount of time.
The Disney-era Star Wars movies have all been massive box office hits so far (save for Solo: A Star Wars Story), with The Rise of Skywalker. Even Disney CEO Bob Iger has said the company released too much, too quickly, and there will be a slowdown of Star Wars films beginning this year.
This isn't a surprise knee-jerk reaction to The Rise of Skywalker's reception either; Disney and Lucasfilm have been planning to put the Star Wars movie franchise on hiatus for a while now. They currently have three new films The Rise of Skywalker's ending to the Skywalker story. It also wouldn't be practical, as anyone who's kept up with the franchise's recent struggles behind the scenes can concur.
As has been well-documented, Disney and Lucasfilm have encountered more than their fair share of an announcement about the 2022 Star Wars movie could be arriving as soon as this month, even that may only concern the film's director and little else.
Add it all together and it's easy to see why the Mouse House and Lucasfilm decided to hold off on knocking out another Star Wars movie right after The Rise of Skywalker (as was originally the plan, back when they announced the sequel trilogy). Truth be told, the larger fanbase could probably use a break from the films too, coming after back-to-back divisive reactions to the last two mainline installments (especially 2017's The Last Jedi). Besides, with The Mandalorian season 2 arriving this fall and even more live-action series being actively developed for Disney+, it's not as though people are going to be hurting for Star Wars-related content while Disney and Lucasfilm work out their new approach.