dust in keyboard.

I am using MacBook Air 2020 m1 model and it's under warrantee and the keyboard is making weird sound because I think it has dust in it!

1. is it covered under warrantee?
2. also think there is a red pixel on my display is it also covered in warrantee?
3. if this all is not covered in warrantee how much will it cost in India?
4. is there any place where I can send my laptop to get cleaned?