I agree with many of the comments above.
The fact that a bully in the workplace doesn't think that she's actually guilty of bullying just makes this whole thing worse. Bullying "unintentionally" rather than "deliberately" is no excuse, in fact it makes the bullying worse. It either demonstrates a lack of self-awareness, or it demonstrates an attempt by the bully to shift the blame onto the person being bullied, as in "I talk tough but fair" etc.
My local Council, Cheshire East, was formed in part to enable the person who became its leader to get the job - he'd not have been able to run the previous council but he had power enough in the part he helped set up. He then ran the council with a culture of bullying, which was only partially resolved by the Conservatives being kicked out in 2019 (he'd resigned prior to that also). It seems that it became a culture of bullying instigated from the top, and wasn't questioned when he was in charge.
EDIT - I guess my point here is that the accusations of bullying ran and ran, even when the former leader's successor implemented an "inquiry". The council built on a reputation for secrecy, lack of openness, and lack of attention to the needs of its constituents. It could be that this Priti Patel thing could run and run also, and yet again Boris Johnson's lack of ability to make decisions would then bite him again - of course he should sack her and promise her a return in due course. In six month's time we'll look back and see whether this issue dies quickly or runs. For sure Labour will make what it can of it, plus there's the pending case for Philip Rutnam which should turn into an employment tribunal next year (20 September scheduled). Or will he now get an enormous pay-off?