Not sure what an "appeal dummy" is, but yes, testimony that has nothing to do with the charges allowed only because it's salacious and might prejudice the jury is grounds for reversal, and has gotten another high profile case reversed by the same court very recently.
his shitty lawyers never objected to much of anything during the stormy daniels testimony. and during the opening statements, todd blanche suggested that the defendant denies that the affair happened, which opened up the door for the prosecutors to introduce specific and graphic evidence that the encounter did occur. so have fun trying to raise that argument on appeal teehee!
even the honorable judge juan merchan ridiculed him for that and pointed out their mistakes during the frivolous motion for mistrial that he laughed out of the courtroom immediately afterwards. the lawyers had every opportunity to start calling objections, but they sat on their hands. they didn't have to hear the graphic details about the stormy daniels affair, but instead they chose to tell the jury that the defendant maintains that the affair never happened.
but hey, they don't get a do-over just because they made mistakes. i guess they can try to appeal this case on the grounds of an incompetent counsel and try to get a retrial, but if they have any objections with her testimony they had every opportunity to raise that issue and make their case before the trial and during her testimony, and they never did shit. that's their own damn fault. that was their own choice. maybe get some better lawyers the next time you dip into your campaign funds to try to defraud elections.
the defense shouldn't have even bothered to cross examine her. they didn't even have to mention her name or the affair. but they chose to attack her on trump's orders. todd blanche even admitted that during his post-verdict interview on cnn.
the best thing about it is that the prosecution didn't even need to call stormy daniels as a witness to prove their case. i mean sure the fraudy orange felon got michael cohen to pay the hush money upfront to stormy daniels, but all of those checks from the trump campaign and signed by donald trump were written out to michael cohen, not the whores that the devoted christian family man raw dogged.