If she does have adhd, it may be that she didn't know what to do about the peanuts and that's why she tried to hide it. To a neurotypical person it might seem obvious to either put them back in the packet and into the kitchen, or to throw them away.
But making a decision like that, after she's made a mistake and let the peanuts go all over the bed and she's supposed to be getting ready for school can seem like a paralysing choice.
My thought process would have been:
"Oh shit, i fell asleep and the peanuts spilled. Mums going to be angry. Do i put them back in the packet, even though they're not clean enough to eat now because i slept on them, or do i throw them away and waste a packet of peanuts? What will mum say if she happens to notice the peanuts in the bin? Will she go mad because i can't tell her i fell asleep and they spilled out? I feel so guilty i shouldn't have fallen asleep and let them spill, I'm such a stupid lazy idiot, why can't i just get things right?
Better to hide them under the pillows and deal with them later when I've got time to think about what to do about it. Hopefully she won't go in my room. Oh no, mum's found them and texted a photo, now I'm in trouble again and there's going to be a row when i get home. Dad wouldn't think this is a problem, I'll go there instead because he wouldn't care."
To anyone who reads the above and thinks I'm just making excuses, or I'm a lazy snowflake, fuck off. this is my experience of living with adhd ever day. Adhd paralysis is a real thing and that's what it looks like in my head.
Honestly, if you think she may have ADHD then the worst thing you can do is shame her for behaviours that are symptoms of her adhd. Perhaps start parenting her as if she does have adhd. There's plenty of resources out there. ADDitudemag.com is a good place to start.
It strikes me that the reason Disney dad might be Disney dadding is that ADHD is often genetic. Maybe he has it too, and was shamed for things he couldn't help in the past and he doesn't want to do it to his own daughter. Obviously not the personal hygiene bit but the bit about him not making her eat food she doesn't want - honestly it sounds like his house is way more adhd friendly where she can make her own decisions about when she's tired, what meals to eat etc. Perhaps you need to give her more freedom to make choices that make sense to her.
Chances are she will be waiting years for a diagnosis. Self diagnosis and acting as if she is adhd is valid in the meantime.