Does teeth grinding during sleep harm dental health, and can it be corrected?

They grind their teeth badly while family members are sleeping.
The sound is loud, so I sometimes wake up startled while sleeping. I can hear it even from far away~

But actually, they didn't really know.

You grind your teeth while sleeping, but you sleep well without waking up even with loud sounds.

Is there a way to prevent grinding my teeth while sleeping, as it is said to be harmful to gum and dental health?
Please share if you know any teeth grinding prevention products.