My LO says this on a morning but I think he’s just hungry and he doesn’t say it again once he’s had breakfast. If it’s not bothering her too much and she’s eating and going for poos regularly then I wouldn’t worry too much
My daughter also says this when she needs a poo. I put her on the potty and she usually goes or not soon after
Could it be when she’s needing a poo? My little girl often says it and I put her on the potty and 9/10 times she does a poo or if not a massive wee x x