I had low nasal bone but did not go for any abnormality scan cause afraid would be more pressured. And since LO had no other issues other then low nasal bone. We opt out of it as it might be too early to sight the nasal bone. The counsellor had also mentioned it might be common for asian.
I wanted to reply to my post above in case any mummies facing same issue. Did NIPT and got low risk results, and also went for a repeat detailed scan 4 weeks later - nasal bone clearly sighted. Try not to worry - and go for your NIPT:)
My friend encountered the same issue and she went for a second opinion at another hospital. Turns out the first result was a false positive and baby is fine.