This is kinda annoying, being asked to verify personal ID just for 0.2btc is not acceptable in this bitcoin gambling industry. They says :
As long as withdrawals are below a certain threshold as outlined by anti-money laundering legislation, typically somewhere around $1500 and above - and... There's nothing suspicious about their account, these people could carry on gambling on Oshi indefinitely
It is clear that your withdrawal is below $1500, so you should not be asked for ID verification unless they say that there is something suspicious with your account. Did they tell you the reason why they ask your ID?