Have you trained her not to?
Slightly tongue in cheek obviously, children are not dogs.. but...
if she drops her coat in front of the door you call her back - no matter whether she's gone upstairs, is doing homework, wants to "just" do x, y and z first - you call her back to hang up her coat. Every time.
Some kids are naturally tidy. Some kids learn from being mildly inconvienced once (by coming back to make good by doing as they should have in the first place) some kids need a hundred call backs, but they all get it in the end.
If she leaves a mug in her room you call her to take it to the dishwasher. If she leaves a towel on her floor you call her to carry it to the washing machine or laundry or wherever you want her to get in the habit of putting it.
Do these things (calling her and making sure she sets things to rights) straight away or at least daily - letting them fester creates an overwhelming task.
It's hard work with some kids but requires consistent parental input.
We've done this with all our kids although tbh one (18 now so to a degree none of my business as long as hygiene isn't an issue) still has a messy room - but no rubbish, no dirty crockery, minimal dirty laundry and no mess in other parts of the house - the other three are fairly tidy. I've also worked in supported living settings and residential settings for teenagers and this is part of the job - teaching these skills but not doing things for people that they can do themselves.
You have to break things down, keep reminding, hold her accountable - that's how pre teens and teenagers learn, not from punishment. Slowly it becomes easier for her to keep things relatively tidy or at least hygienic and mess confined to clean and dry items like books/ craft stuff/ maybe some clean clothes on chairs and stuff or clean laundry in a pile not yet put away - than to be constantly called to sort things out.
Eventually it becomes a habit - but it might take supervision every day for a year...
Ignoring mess and squaller building up then once a fortnight exploding, demanding she tackle a huge task by herself, and punishing won't get you where you want to be in a year.
Don't let her eat in her room - at least until she reliably keeps it tidy, and then only on condition everything comes back to the kitchen before bedtime or eating in room privileges are revoked.