If the report exonerated them, and showed they even have a Israeli bias, why would they spend 50k in lawyer fees (disclosed so far, real number is probably higher) to hide that report?
There is obvious distrust on western sources of the conflict and the UK active participation in the creation of the 2 state solution, as well as its alliance with America all taint the possible impartiality or accuracy of the BBC. But the accusations against them for antisemitism and anti israeli bias go back decades
The covererage of the Genocide in Palestine (and I'm betraying my view just by calling it that) just brings this into incredibly sharp relief as there are, to a first approximation, no real centrists in that discussion. And yet you still get the same 5 minutes of interview for a doctor on the ground in Palestine and for Ben Gvir, presented as if there's some kind of happy middle ground that everyone can broadly agree on.