No doubt that is where she learned the behavior - and BLM. If the older kids get to trash stores, why can’t she?
When our kids were very little it didn’t take them long to figure out that tantrums weren’t tolerated. At the grocery store with an almost full cart, my wife left with our twins - leaving the cart. We had some white rice with butter for dinner. (Well, my wife told them I would be back for the cart, and my wife and I had a real dinner later.)
Another child missed out on a fun day in the mountains and snow. “One more outburst and you’re not going.”
It took our kids two or three times of stuff like that to figure it out.
But whatever the threat was - it had to be followed through. (I REALLY wanted that one child to get into the mountains with us!)
All that said, some children DO have mental issues where tantrums are less readily solved.
Parental neglect from the get go.....where were her parents while she’s trashing the store? Obvious they didn’t know where she was.