Gender correct?

I have two girls already but I cannot find their US to compare. I did the sneak peek clinical DNA test at 12 +3 weeks. Got girl results. Went to an elective US clinic and this is where they confirmed it’s a girl with this US photo. This was done at 15 weeks. But someone recently brought to my attention the line that is clearly visible and going straight back. Said that resembles a boy? Thoughts? I’m 19 weeks now and my anatomy scan isn’t until I’m 22 weeks so I’m just curious on others opinions.