If you look at all entities, they all have their own baby textures. On Bedrock preview, an unused texture of a baby variant can be found in the files though not being used right now
MC-307359
Baby Sulfur Cube is missing its unique texture like other baby variants of entities
Resolved
Invalid
1
(Unassigned)
Confirmed
Expansion A
Textures and models
26.2 Snapshot 1, 26.2 Snapshot 2
Retrieved
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