Nearly, not all, every attorney defending someone in a federal case asks for multiple mistrials during the trial.
Sydney Powell kept saying she wanted a mistrial, but never officially filed a motion as far as I can remember.
Manafort asked for a mistrial,
Blagojevich requested a mistrial
Ghislaine Maxwell requested a mistrial.
It's defense lawyering 101. Try to get the case thrown out for any reason, no matter how spurrious.