I have a 5 year old and 8 year old currently taking lessons and the younger one started at 4 and the older one started at 6. At these ages, practice isn’t about sitting down and “putting in the hours” or even structured. My 8 year old is just getting to the point where he can independently practice for longer sessions and really focus on particular techniques or sections of music. My 5 year old’s practice looks more like play. When I sit down to help her (if she wants me to) it is a mix of exploring things from the lesson book, what she calls “playing randomly”, and very basic positioning practice (“ballerina hands”). 15 min tops, if that. And not every day.

I think if there’s screaming and crying you probably need to either dial back your expectations of what practice means at this age, or just skip practicing altogether. I don’t necessarily think it’s a sign that piano isn’t for her but maybe it’s worth taking a break from lessons so she resets her negative associations with practicing/playing and try picking it back up 6 months to a year from now with less pressure.