God some people on this thread are so maliciously awful.
When I was a kid, I struggled very badly to keep my room in order. It didn't help that until I hit my teens that I got my own room. This meant I shared it with my brother, who is also one who struggled. We used to get shouted at and belittled, horribly shamed, and left to feel devastated and crying.
There is a point with ADHD brains where we cannot take any action when we hit the point of huge overwhelming freeze. It's not because we don't want to. We will stand or sit in front of an overwhelming thing with the intent of getting stuck in, but instead our brains make us zone out, stare into space, and stay painfully still until the disco brain kicks in and we flee to somewhere less overwhelming.
We also stop seeing things. I've been so used to where something is in a room, that if someone asked me where it was, and I didn't use that item regularly, I could stand in front of it and say it's not there. Why? Because I've since learned something called "room blindness", where if we don't use something every day or more, we forget we have it and then can't find it, even though it's right there.
Not that I expect a lot of you to even believe that, but hey.
It's so bloody hard keeping on top of things, I want to get rid of a lot of my stuff, because the less I have, the less it is to have to keep in order.
I'm so glad your daughter was happy that you went in to help, and bollocks to anyone who's being shit about this.
Maybe once a week you can ask her to help you take some things downstairs that she might have forgotten about, so nothing builds up again. Make it something you do together, because body doubling makes a lot of difference with managing tasks.