Are wearable pumps actually working for those under 12 weeks pp?

I have momcozy M5 and I want to start using it for my night pumps but I was told by lactation consultant that wearables aren’t meant for those whose milk hasn’t regulated and to wait to use it until 12wpp. However, I’ve seen so many moms on here saying they are using wearables. Anyways I tried using the M5 one night on my left boob while baby was feeding on right and I ran it for 16 mins and literally had two drops of milk. I am an oversupplier so this was very strange. I also do have the right size flange on there and I did feel nipple stimulation the entire time but the sucking was not as strong as my electric pump.

Anyone else have a similar situation or have any tips for me?