A few points. Observation only.
Trump was fact checked on numerous occasions. Harris was fact checked zero times.
The disparity of questions. Harris got some softballs. Trump had hard questions Harris didn't.
Harris was devoid of detail. Talking in generalities, the policy page on her site is pretty well a cut and paste of bidens web site. Again, lacking any detail.
Trump gave a warmed of version of his rally speeches. His policies are there for the reading. They are the same policies he's been repeating at every whistle stop. People know what Trump stands for. Harris is still an enigma to most voters.
Focus groups of undecided voters made point that they still don't know what Harris stands for and were disappointed she didn't speak to the real problems they are facing. Many voiced that no matter the debate, things were better for them under Trump. Under the Harris term people are far less solvent because of her existing programs. Straw polls have shown a decent amount of undecideds have moved to Trump after the debate.
Harris hasn't explained her flip flops. Bernie Sanders has stated she remains the progressive she has been for years and right now is just doing what she needs to do to get elected.
Bernie Sanders has also stated that the middle working class is in dire straights. That can be laid directly at her feet.
Harris has admitted that Dana Walden, an executive at ABC/disney, and she are 'extraordinary friends.' A relationship that reaches back to 1994, and Walden has made donations to Harris' various campaigns of at least $20,000, since 2003. This has been brought up as a massive conflict of interest.
Everything here is open source from various sites. I'm just putting it all in one spot. There is much more if one wants to look. Agree or disagree is not any concern of mine.
My personal opinion is that this was a wash. Neither candidate is going to get much of a bump out of this, if any.