What do casino's ask for when they request from you these?
KYC level 2
KYC level 3
As far as I know and in most general terms I have seen KYC for casinos only at Level 1, rarely going through the process for KYC levels 2 and 3, however usually the next level of KYC depends on your gambling activity or on the user's demand side.
But I have read the requirements for KYC level 2 & 3 that are requested.
For example:
To comply with KYC Level 2 & 3 requirements for online casinos, players are typically required to provide a variety of personal information (location, age), including government-issued identification documents such as a driver's license, identity card or passport, and proof of address such as utility bills, bank statements, and salaries. In this way, in addition to checking the legitimacy of the funds, namely their source, the casino can verify whether the user is capable of playing.
The point is: I haven't reached KYC level 2&3 yet, maybe one day when I reach it I will give it to you and as far as I know, different casinos have different KYC requirements, I mean additional requirements besides passports.