Automatic increase of brightness when user returns back to screen

Hi vineet223,

welcome to this Apple (user-to-user) Community!

Re: "Automatic increase of brightness when user returns back to screen"

There are ways to: Keep the iPhone display on longer - Apple Support

Sorry I don't know of sure-fire way to achieve your desired result.

Seems the existing option is to use or not use the attention aware feature. I may be wrong.

If you'd like to experiment:

You can try toggling off the attention aware features button that dims the screen to preserve battery life.

Settings > Accessibility > FaceID & Attention >

You may also want to try using the "true tone" setting which "adapts the color and intensity of the display to match the light in your environment." Settings > Display and Brightness: > turn on / off True Tone

More info. and other options if needed: Adjust the screen brightness and color on iPhone - Apple Support

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Re: "However, there is no option to automatically increase brightness when the user returns to the screen.

Is it possible to add this feature or is there a setting for it ?"

You may want to check for suggestions via the Accessibility Assistant shortcut:

If needed: Apple's YouTube video explains how: https://www.youtube.com/watch?v=Ih-TIHdF4MU

or

You may want to check on this feature with the experts on Apple's Accessibility Support Team.

How to contact Apple for help with accessibility features - Apple Support

or

You could email an accessibility-feature request to the Accessibility team: accessibility@apple.com.

All the best :-)