Perhaps try the workarounds in these threads @Sarabadani
"SOLVED: TO THOSE WHO ARE HAVING PROBLEMS OF VIBRATING WHEN THE SOUND IS MID TO FULL.
SOLUTION: GOTO SETTINGS->ACCESSIBILITY->HEARING ENHANCEMENT:
Then Left/right sound balance.
Push the slider all the way to the right.
Then turn on the "mono audio"
This will remove the vibrate when having a mid to full volume of sound."
🌈 Stay Safe & Stay Alert. 🌈
Current Phone ~
Samsung Note 20 Ultra 5G SM-N9860_256Gb SnapDragon 865+
Samsung One Ui 3.1/ Android 11.
Thanks alot for help very good low vibrate but just sound is from down speaker is true ? I use with out mono audio because when on mono have problem again Vibration