Have you just been asked for KYC and now you are waiting for approval from them or you are asking about it because you are going to do KYC later?
I cant find information on their terms page and AML policy page about how long they process KYC but normally in other casinos it is usually under 24hours.
They have live support IIRC, maybe the support can give you a better answer about your question.
It seems that Airbet official representative is still on holiday as he is not online since the last day of 2024.