How early did you find out the gender of your twins?

I am expecting fraternal twins & I know with a singleton, you can find out as early as 10-12weeks by performing the NIPT test (not sure if NIPT will determine twin gender)

I forgot to ask my doctor, so wanted to ask here:

How early did you find our the gender of your twins? & How? (Was it via a particular Test or only through an ultrasound?)

Thank you!