Thomas went through this hun. He prefered to sit on the big toilet at first, I'm not sure why but I don't think he actually liked to see what he had done iykwim
he also used to go mad if we cheered and clapped him.
I basically just went with what he wanted because I felt he wasn't quite ready yet anyway so we just made it fun when he wanted it and ignored it when he didn't. It's weird because at one point he refused to use the potty and would only use the toilet but now that he is actually ready he is the opposite and isnt at all keen on the toilet
strange little creatures.
I don't have much advice hun other than let her guide you, if she isnt keen on the potty then let her use the loo etc but sounds like you're doing this anyway. Just go with her and see what happens. She will just suprise you one day by having a completely different reaction and then grab the opportunity and run with it from there.
Good luck
xx