Summary:
Screen and hand wobble does not indicate the direction the player took damage from. This java change happened in snapshot 23w03a.

Steps to reproduce:

1. Run all these commands:

   /summon boat

   /summon zombie MCPEBUG 

   /execute at @e[name=MCPEBUG, type=zombie] run fill ~2 ~10 ~2 ~-2 ~10 ~-2 dirt

   /effect @s regeneration 1000000 100 true
   

2. Go to survival.
3. Approach the zombies from different sides (back, side, forward).

Observed results:
Screen wobble and hands are always the same.

Expected results:
Screen wobble and hands will correspond to the direction from which the player received damage.

Video:
Watch out for the hand
Java MCPE-169593.mp4
Bedrock MCPE-169593.mp4