The separation of functions between food and detergent is a luxury you can definitely afford :D You don't gain much more space by folding together, since you still have the two doors.
You're of course right there. I don't think I would know how to do it either - whether two rooms or one. Possibly I would remove the access through the kitchen (?).
So we will definitely also use the room as a storage room, the freezer is also in there. Therefore, I think the second door will stay.
A larger room would also have the advantage that it could be used differently. For example, if there is one more child. Or a sleeping option on the ground floor in old age. Ypg is right about that.