From memory of a video saw on the topic, in the district where it was lodged there is only a list of 7 judges to pick from in florida. But it gets narrowed down to two for various reasons (security clearance?), and it turns out the other judge is busy or on holidays.
Edit: this legal Eagle video covers a bit of the selection https://youtu.be/_S8R2Nri5pU. TL;DW: “random” from list of 7 judges but cannon has one of the highest chances of getting the case.