So the hand moves roughly the same amount for both Bedrock and Java but the difference is Java has a "scale" for how much it moves whereas on Bedrock your hand moves the maximum amount no matter how slowly you turn your head. (First person perspective)
To recreate if you dont understand
-Open Bedrock in first person mode
-Open Java in first person mode
-Move your head very slowly in Bedrock and take note of how much your hand moves
-Now do the same in Java and notice how little the movements are
-Now in Bedrock move your head relatively fast and take note of the amount your hand moves
-Now do the same in Java and you will notice it is about the same
Therefore Java is scaled whereas Bedrock has a set amount of how far the hand moves
Thank you for your report!
We're actually already tracking this issue in MCPE-54072, so I've resolved and linked this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – 📖 Game Wiki