If letting Trump rant on for more than the allotted 2 minutes they were supposed to speak for was biased, then the moderators were on Trump's side.
If letting Trump get to rebut what Harris said in her 2 minutes before responding to the next question asked was biased, then the moderators were very lenient to Trump way too often.
If having Trump's mic on before Harris finished speaking but having Harris's mic off when Trump was ranting was unfair, was that unfair to Trump? It seemed that Trump was the beneficiary of being allowed to interrupt Harris as she was wrapping up her response at least half a dozen times.
Trump got more than twice the time to speak at this non-debate event than Harris. If he used this advantage to spew lies and rants and nonsense rather than directly and calmly and factually responding to the questions he was asked, that was Trump's choice. If nothing else, when weird Uncle Donnie continued ranting to the TV cameras long beyond the allotted time to answer questions, the moderators attempted to rein Trump in rather than let his rants go off the rails.
The moderators were generally solicitous to Trump and allowed him to digress endlessly with criticisms of America's conditions, of fictional pet eating immigrants wga, of Democrats, Harris, Biden, China, the military and his administration's national security staffers who resigned or were fired, then what Trump did and how he behaved during those rants was all Trump being Trump.