Yeah, listening to children is an art! That's great that she's starting there to try to ask for your help to handle her emotions.
It sounds to me like she needs first of all firm boundaries. She needs you to say 'no'. It's frightening for a child to feel that they are in charge. She wants to know that you are in charge, as her parent and carer.
So this is her asking you to put that boundary in place. This is your cue to say 'no'. You can say it gently and kindly but firmly. No.phone.
She will test to see.if this boundary is firm. If it is then she may test to see if she can safely express her feelings. She's six, she may not want to chat about her inner world. She may want to cry her head off, or rage, or say she hates you. Children are making sense of the world, they are often irrational and they cam have very 'big feelings' that scare them. You are there to show them its okay to feel them and that you will keep them safe as they do so.
This is the hard bit. You need to make it clear she can feel however she feels, but is not allowed to hurt herself.or you. Then you stay with her and hold space and allow her to weep or rage or whatever. The hard part is staying calm! It can be very difficult to allow out child to process emotions.
This may take a bit of time, but if you can allow her to express herself in the manner.she needs to, in.the context of a defined space and time, this can.be transformative.
You're doing great, OP. Parenting is hard! Take care and good luck.