EB3 under administrative processing Consular Interview - Delay

We applied for EB3 visa and attended the interview way back 2018 November. They need additional document so we’re under administrative processing we sent that paper works Feb.2019 until now no update yet. Don’t what happen

Well, any administrative processing can take time…it is a black box and we do not know how long they would take. Usually, you can follow up with them in 6 months timeframe. You should reach out to the consulate and check with them as it is really long.