3/8 inch grey dot appeared dot within darker dot.

Katana-San makes a great point. If so, you can go to Settings > Accessibility > Touch > AssistiveTouch, and turn off.

Hello~ Click on below and does it look like the picture below? The part circled in red? If not a screenshot with no personal information would be great.

Use AssistiveTouch on your iPhone, iPad, or iPod touch - Apple Support

~Katana-San~

It would be very helpful if you could provide a screenshot to what you are referring to, so we can better assist you.