That said, your project history does show an earlier floating-copper problem associated with Trace auto, and the disconnected items tied to that earlier state were around:
If you still see the review entry in the UI, refresh the review panel or click back into the PCB canvas and re-check it. Flux’s review system is the authoritative source for whether the floating copper still exists.
If you want, I can help you narrow it down further by checking one suspect area at a time, starting with
L1 and the 12 V output section.