Obama, Biden, Fetterman rally staged green screen event

Sometyhing really wrong with this "rally".
I think the crowd was filmed at a different time or the crowd footage has been manipulated in some form. Looking at the three puppets, it appears that they are stood in front of a green screen. Then we have the issue of at least 12 people having exactly the same mobile phone all in one area.
Were these phone synced to display the same images to make things look more real?
What do you think?