If binance discover that you are running more than one account, as this is a violation of the conditions of use, it may lead to Account Freezes, Permanent Bans, and the loss of access to deposits with these accounts.
Then why was the account merging feature invented if using multiple binance accounts is prohibited?
As for what will happen in the case of Merge, the activity of one of the accounts (which has not completed KYC) will be deactivated and allow the use of the other account, so then withdraw any deposits before taking the step.
Do you even understand what nonsense you are talking? Withdrawals from a Binance account that has not passed KYC are not available by default