There isnt 4 million i think there is around 2.3/2.4 million
Funny how the exact number has not been made clear yet
Supply can be easily found within the wallet. The question is total supply at the end of pow. If pos is already in effect than it depends on if pow is capped at block height which is likely the case. In that case total supply at the end of pow will probably be around 5 million depending on staking weight.