Reports of the Miami crowd are pretty underwhelming, something like 20-30 MAGA freaks showing up to protest their leader being getting prosecuted. Cops and press well outnumbering the crowds.
Consistent with a real lack of energy in the post Jan6 MAGA space. Kinda seems like everyone took the lesson of all the die-hard Trump footsoldiers getting hoovered up by the feds to heart. Trump seems to have burned a lot of resources on that dud and these later showings are much more sedate.
Not to say that the reactionary right isn't still extremely active and belligerent, but they seem to have mostly focused on non-Trump issues like menacing outside drag shows or making thinly veiled threats at school board meetings, which are admittedly much softer targets that don't result in much police response.
https://www.npr.org/2023/06/12/1181773055/trump-court-appearance-tuesday-miami-extremism
Edit: But to play devil's advocate, it's also 30 C and 80% humidity in Miami today, so standing around in the Florida sun hooting and hollering on asphalt probably isn't an attractive offer.