Gender?

How did everyone find out the gender early? I’ve been seeing people finding out aroun 14-16weeks! I had multiple genetic blood tests done, I thought they were able to see chromosomes with that but they said they can’t, but my last ultrasound wAs 12+5 and I’m gonna be 17weeks on Thursday and haven’t had an ultrasound since. It’s frustrating because I feel like my doctors can find out the gender, they just don’t wanna tell me idk? My anatomy scan is June 10th, I know it’s not that far away but still I just wanna know already lol