Is your daughter on a IEP? If is you can talk to the IEP Team and request that your daughter be able to use a private bathroom with a lock on it. The school should have private bathrooms throughout her school. I would talk with the Administrators of school and tell them what is happening. Your daughters IEP can help with your daughters issues with using the bathroom. Requesting a private bathroom is called an Accommodation and the IEP can get that request approved and your daughter bathroom needs will be approved and no more problems.

Thanks for ur reply. My daughter hass issues with the toilet sign and the brand on the toilet bowl and sink. She has no issues with the sound . She's verbal so this is what she told me . She is ok with home toilet.

When my son was younger, he hated the hand dryer and the sound of toilet flushing. I bought a pair of headphones and he used them at school or whenever we went out to public places. He didn’t speak in full sentences back then so we used PECS.

Does she use the toilet at home?