Hi there, we did get nap refusal at this age some are dropping naps around now.
If you feel LO needs a nap try the car nap or have u tried putting her down later at home?
Most LO need a short day when dropping naps so with a 6.30 WU I'd try a 5.30 BT so that your then not getting into OT territory. I know you've said you've tried early but sometimes you need a leap of faith and go that bit earlier x