Im are the users of Kucoin. I had a last trasactions yesterday for request of withdrawal it is will take a few minutes like at least 30 minutes as noted in webiste. Then a transactions has had 90000 for the GAS, I think that's are good system, which means they have a transaction with enough priority.

as you writen above, you can go to "log withdrawal" then checking or click for eth, there you'll get an infomartion for history your withdrawal. (there you go for a has tx).
then did you checking your address at explorer or double checking your address? probably something wrong happens be found.