Another one about nursery staff's tone

[FeelsLikeFrome]

Prompted by the other thread on a similar topic but not wanting to hijack that one.
DD has just turned 2. She's been at nursery 2 afternoons a week since she turned 1. It's the same nursery we used for DS, and really liked it, although he started age 3, so was never in the baby room where DD is.
Lately when she's playing with her dolls she'll say "baby crying" and then shout "stop crying baby!" in an angry voice at the doll. The other day she shouted "stop that racket!" at the doll, which I have 100% never said to her. (Her dad and I have both, on occasion, said "please stop crying!" in a frustrated tone when we're really overwhelmed, which I realise is unhelpful and counterproductive. 95% of the time if she's crying we offer a cuddle/empathise/fix the issue etc.) I've asked her if she knows anybody who shouts "stop crying!" when a baby is crying and she always says the name of her key worker at nursery, who she generally seems very close to and talks fondly about. Her key worker is also the room leader.
I hate the thought that she might be upset at nursery and someone is shouting at her for it. But I also recognise that sometimes the demands of multiple young children become so overwhelming and I'm not so naive to think the staff never have an off day and speak a bit harshly to a child. I'm struggling to think through how much of an issue this really is or whether I'm just being a bit precious about it.
AIBU to raise it with the manager of the nursery?

It's a hard one because you don't actually know the tone it was said in, you only know your daughter's tone. As an example, with my kids I would sometimes say "put that lip away!" with a wagging finger, as a joke to make them laugh (which often works!). I know it's the done thing nowadays to acknowledge and allow space for all feelings and what have you but it's also sometimes necessary to either distract them or encourage them to buck up and get on with things!

So yes maybe speak to the manager but do it carefully and openly, not with an accusatory manner. You could say that you're noticing DD getting upset more often than usual and you want to know what strategies they use to manage upsets, so you can mirror the language at home etc.