The Shake effect done to a zombie villager while converting to a villager shakes their body, but not their head.
Steps to Reproduce:
Spawn a zombie villager in a shaded area
Throw a splash potion of weakness at it
Feed it a golden apple
Observed Results:
The zombie villager's body shakes, but the head does not.
Expected Results:
The head should also shake.
Piglins and striders are already covered in MCPE-75036 and MCPE-69511.