Which I- phone models have the orange or blue dot on the screen?
Which iPhone models have and orange and blue dots ?
iPhone 7
As it will tell you in the link shown at the top of this page, iPhones running iOS 14 or later.
An orange indicator 
means the microphone
is being used by an app on your iPhone. This indicator appears as an orange square if the Differentiate Without Color setting is on. To enable Differentiate Without Color, go to Settings > Accessibility > Display & Text Size.
A green indicator 
means either the camera or the camera and the microphone are being used by an app on your iPhone.