The normal 4 'fruits' are not necessary for classifying a glyph as GD21, there are 3 'fruits' in Aa4-14:
This is also the only example of GD21 in Tahua. Aa6-55:
is probably not a combination of GD45 and GD21. Instead the left part presumably is GD88 - that can be established by the parallel glyphs Ra3-103--104:
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