Do it with her, sounds hilarious but to get my LO to potty train(poop not wee) I would ask her if she needs a poop regularly and then go sit on the toilet same time as her on the potty and act like I’m going so she goes 😂 eventually she would as me “mama need a poopoo?” And I’d say no baby but you can go alone quickly and she would 😭😂
Have you ever tried to put her in pants for an hour or so? I know it's hard when they throw tantrums, but I'd probably start with "hey, this week we start something new, you gonna wear pants for an hour each day". Make a timer and then put her back in nappies after an hour. At the beginning I'd only do it at home. And then slowly increase the hours on a weekly base.