Does trading Forex, with the aforementioned controls including the use of leverage, and the ruling on withdrawing funds, fulfill the conditions of an Islamic account and make it permissible?

It is not permissible to trade in Islamic Forex as long as it involves leverage, because it is a loan combined with a counter-value (compensation), and it is not permissible to combine the two. Furthermore, a condition for currency trading is that the exchange takes place at the same session (spot transaction). The recording of funds in an account without the immediate ability to withdraw them means that the legal possession (qabd) has not been achieved, which would then fall under Riba An-Nasi’ah (usury of delay).