That's a good question. Comparing the Softbank emoji from June 2008 [0] and the initial batch of Apple emoji that shipping in iPhone OS 2.2 (Nov 2008) [1], it doesn't look like there are any missing at all, it's a perfect 1:1 mapping.
0: https://emojipedia.org/softbank/2008
1: https://emojipedia.org/apple/iphone-os-2.2