20A Bathroom Circuit including lights/fan, add outlet for 1300w(max) bidet
Both items are not continual use and even if using a hair dryer while the bidet is heating it may not trip inverse time breakers will handle a brief overload without tripping, it would be similar to my granddaughters using a curling iron and a hair dryer at the same time, every now and then it trips but not enough for me to run another circuit.