"I cannot find the audio record enable option"
Are you saying that videos you record using the Camera don't have any audio?
As you expect, videos recorded by the Camera should have sound. There is no option to disable recording sound.
I would try:
- Reseting the Camera settings. Camera -> Settings -> Reset settings
- Wiping the S21's cache partition.
Ok so I figured it out. When you go to review the video....look on the bottom right of the video and yoy will see the little white speaker with a line through it. Tap it and voila! Sound. It is so stupid! Why would you need to do that!?