Have you had your booking appt? At mine they put a request for the scan and I got notification of when it was the next day
I don’t know if it depends which hospital you’re with but I had to call and book mine myself after my GP confirmed the pregnancy
With my first I didn't have my scan until 14 weeks...depending on where you are depends on how it works...in my area the midwife has to do a hospital referral and this was missed. 😬
My midwife submitted the request at my booking appointment which was on the 13th September I think. Got my scan date through about a week or so after.
I would give them a call as if you are doing the screening there is a date range where it has to be done.