Dressing Room > Edit Character > Body > Mouths > Under "Owned Mouths", the Open Smile selection is no longer listed. Had used this selection since the purchase of the game back in 2020. I noticed the change since the 1.19.20 update.
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Update 01/14/23:
The option for the "Open Smile" can be seen in Minecraft.net as an available option in September 2019. (https://www.minecraft.net/fr-fr/article/character-creator-now-bedrock-beta)
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