Need some advice from other moms

Hi everyone. Looking for some advice for my almost 6 yo daughter. When she gets upset or doesn’t get her way she automatically goes to hitting myself and her dad. This has been going on for about a year or so and it’s just getting worse. We do not hit or spank her and never have. There is no domestic violence going on at home and she is with us all the time except while she’s at school. She hasn’t had a working tablet for the past 7 months and the only tv she watches is in the living room with all kid appropriate content. I’ve tried redirecting, time out, taking things away, reasoning, threatening, giving her space and alone time, talking when she’s calm about respecting other people’s bodies, talking about why she feels the need to hit us, etc. we read books on how to handle emotions and being kind to other people. I’m at my wits end and truly don’t know what to do. She is so sweet and kind most of the time but when she gets mad she’s so mean. We did have a pretty big life change this year, moved 7 hours away from the home and family she’s always known. But honestly it was happening before we moved. Is this behavior relatively normal? Any advice or ideas would be appreciated.