Well said. I have the same issue on my S21 FE Exynos.

This is the latest report from when I contacted Samsung Support.Thank you for contacting Samsung Electronics.We apologize for any inconvenience you may have experienced.You can visit one of Samsung's authorized service centers for repairs.https://www...

Lot of another users already reported same type of issue.https://www.reddit.com/r/samsunggalaxy/comments/1vrvk0i/audio_issue_on_samsung_s21_fe/