Steve's skin has been updated in 1.19.50.21 Preview. However, the texture of player head has not been updated at the same time, so the player head still uses the old skin instead of updated skin.
MCPE-165903
The texture of player head doesn't match updated Steve's skin
Open
37
(Unassigned)
957557
Confirmed
Multiple
1.20.40.20 Preview, 1.20.30.22 Preview, 1.20.30.21 Preview, 1.20.30.20 Preview, 1.20.20.23 Preview, ..., 1.21.50, 1.21.60.25 Preview, 1.21.60.24 Preview, 1.21.60.28 Preview, 1.21.51 Hotfix
Retrieved
This is still a parity, new Steve in Bedrock Edition is not good as Java, and I hope to change the appearance of the head according to the Java version