If the judge says you can’t ask questions, why would that judge entertain a motion for mistrial?
the point would be to get the notion of a mistrial on the official record by filing it with the court. the motion would spell out the difficulties caused by the judge. it would be a hail mary message to the appeals court. a decent appeals court would consider the reasoning included in the motion and expanded upon in the appellate filing.
(heck i dunno, i ain’t no hifalutin’ appellate lawyer none, y’all hears)