The two finials at the foot corners are made separately and threaded into the leg posts, and that is a deliberate decision about the day the diwan arrives at your house.
A finial is a slender turned form standing proud above the frame at the most exposed corner of the piece. If it were carved integral with the leg post - which is perfectly possible - then it would be permanently in the way. Every doorway, every stair turn, every moment the piece is set down on its end during a move puts that finial first in line, and a broken integral finial means repairing the leg itself.
So each is turned as its own piece, with a threaded dowel at its base seating into a socket in the post. They are fitted after the diwan is standing in its final position, and they can be removed again any time the piece has to be moved.
Their height is set with the seat cushion in place. A finial that finishes level with the cushion looks accidental; it needs to clear it by enough to read as a deliberate upright, which can only be judged with the upholstery on the frame.