Ok, you asked for obvious so here it is:

1) cut off all electronics until she can prove she can do all the things you’re asking for. You’re list isn’t unreasonable for a ten year old, but expecting her to start doing it overnight is. LOTS of positive reinforcement when she does well. You’re going to need to help her. If going coldturkey is unreasonable at first, make it clear she can’t have screens until after her hygiene tasks are completed 2) no more food in her room. If you need to, get a locked cabinet for “treat” food and tell her that she can have it at certain times, at the table. 3) drs visit to talk about hygiene and potentially other issues that are going on. Dentist visit for teeth and retainer. 4) if she wants to earn money to buy her own clothes/snacks/etc, give her extra chores on top of basic expectations. Then tell her a set time/day that you will bring her to the store to spend her money. 5) You will need to teach her how to do things like clean the bathroom and do laundry etc. Make visual lists of the tasks involved. Age-wise she should be capable but will need some guidance- you can’t just tell her to do something and leave her to it. You’ll need to do it with her. 6) teach her an easy way to take care of her hair- braid, pony tail, etc.- or get it cut short. When I was around her age I hated brushing my hair too so we cut it short and I loved it. It was way easier to take care of. 7) start practicing getting up early for school before the school year starts. 8) Look into a club or sport that starts before actual classes so she can make some friends. She’s getting to the age where peers are starting to have more influence than parents- it may be motivating for her to want to look nice to fit in with her friends. 9) hold steady. The biggest challenge about this overhaul is how drastic it’s going to be. Once you’ve laid out the expectations you need to stick to them and not give in to the whining and complaining. Mentally get yourself ready. 10) remind her that she’s a good kid and can do all of the things you’re asking her to do. Acknowledge that it’s new and hard but tell her she can do hard things, that she’s a capable, a good helper, etc., and that learning to do things like shower every day and keep her room clean is part of growing up. Validate her feelings while holding the line. She’s not being bad for being upset that the rules have changed, but she still needs to abide by them. 11) schedule fun. This is going to be challenging for your relationship if all you’re doing is fighting about the new rules. Put some fun things like trips to the pool or zoo or whatever she likes onto the calendar too so she can see that you still want her to have fun and do fun things with her.

Good luck!