[2023] Request: One-day extension of Snowflake Season 2022-23.

I do understand your point. You have the Ship XP and Credits to already have the ship, so if you "own" it already than could you attain the Snowflake for it? Further, you could make the case that any player who had enough Free XP and Credits to purchase a ship could already have theoretically ownership of said non-available IJN CLs.

Unfortunately, that is not possible. The IJN CL line has not officially entered the Tech Tree yet, though they should be entering it next patch, I think.