Would a potty shot show boy parts at 18 weeks?

I had my follow up scan today after my bleeding, everything is fine thank god!! I asked doc to check for genitals and she got a good potty shot up on the screen, which i could see really well. For me it was a clear girl, no sign of boy parts at all! But doc said she couldnt see yet maybe next time 🤔 im raging i mever asked her for a picture of the shot to show you guys but do u think I could be right and she was afraid to say just in case??