That's my thinking. I cannot picture Kennedy literally making the show without Disney's approval. But it could be a situation where she raised a fair amount of outside money to finance part of it.
She probably just ended up on the hook when the show bombed. I mean, it's possible to get pretty leveraged with debts if you are overconfident with a high-profile project. She could have made multi-season deals with lenders or subcontractors. They were starting work on 'The Acolyte' back when Star Wars was still considered a slam-dunk investment, at least in business circles. Even Kennedy's first couple of SW movies made a lot of money.
I was curious if, and this is if she really does owe anything, if it is the over budget amount. Just how much of her contract as producer makes her responsible for over budget? Over budget by definition would be breaking or, said politely, exceeding your contractual rights. She is down for producer on 8 episodes which puts her in line with that possibility of breaking her contract by exceeding agreed levels (obviously that isn't a new thing as a producer's contract) but without seeing the contract, there is likely no way to prove that at all. But, I am sure that overbudget would have been ignored if they made a profit. It looks like it would eventually on streaming, according to rough budget figures. However, those numbers that I saw could be projected and not even reliable. The only solid truth is that without the serious tax breaks given, it would be already a loss in the tens of millions.