Why my theme park supports black and white only?

Why photo appears like this? Ps: No phone cover or finger near lens, Lens clean

I am a doctor,  currently working in COVID OP.  I have to use mobile phone while working so that I used to cover the phone with a plastic cover.  The problem is sometimes I cant hear the other person talking .  Call volume automatically reduces.  Is ...

I have bought Galaxy Note 9 from UAE and it doesnt support call recording from there.  But now I am in India and still I cant record calls.  HOW TO ACTIVATE DEFAULT CALL RECORDER?