I've done a quick poke around on the internet, and from what I can see she's probably caused the demonitizing (if that's a word?) Herself.
YouTube don't allow people to make money from videos about a lot of things, including mentioning Corona virus, which she's done, discussing "tragedies", so maybe the cat dying? And videos including certain trigger words, one of which is boobs, and we all know how much she likes to talk about those. There's more to it than that, these are just the things that jumped out at me. I'd guess cutting her ties with channel mum won't have helped either.
The Only Fans thing has got me gobsmacked. There is no need for anyone to pay for breastfeeding advice, there's plenty of free sources out there, and she should know this, so I can only assume she's aiming those videos at a different audience.