I have no idea how KYC will help you in testing a new casino especially if we are playing with small amount of money.
Dont you think it is risky to give your identity for a new casino?
I would prefer to test new casino with small amount and without KYC than completing KYC just for testing purpose.
One more thing, be careful to increase your stake/bankroll although you managed to withdraw small amount on your testing purpose.
Scam casino will let you to withdraw small amount in order to attract you so you start a new session with bigger money then the scam casino will start their bad actions.
in my opinion the risk of giving your identity to a new casino or to a stabilished one is not so different
in both cases you should consider it lost in a way that you possibly won't be able to know if your documents were deleted after verification or not
both risk
though there aren't many casinos without KYC nowadays, right?