It was actually rolled around the site.
Fans may see the film's filming locations in a brief featurette: for example, you can see how the actors from the film travelled around Rome.
The metal ball destroying the city was indeed moving around the area; at least some of the explosions were also real.
A very clever point: to keep the ball from falling, a special suspension was utilized (apparently, this design is very light). The sequence with the ball breaking the bus apart isn't CGI, but it was actually shot.
The film Rush Limbaugh will premiere on May 19, 2023.
This is an interesting story.