Recovering deleted notes app

Try this: Use App Library to search Notes app, see this Apple article:

Organize the Home Screen and App Library on your iPhone

Organize the Home Screen and App Library on your iPhone - Apple Support           

If you have find the app, tap & hold on the app, then drag to the Home screen & drop it.

lm2500 Said:

"Recovering deleted notes app: [...]App Store only gives the option to ‘Open’ the app (where I can see my notes) not download it (see image). Any thoughts please?"

-------

Thank you for the screenshot.

Reset the Home Screen Layout:

If widgets are not working as they should, then you need to reset the Home Screen Layout...

Go Here: Move and Organize Apps on iPhone - Apple Support

You'd have to add back all the widgets that you can recall being back on there. So, write down what is currently on the Home Screen.

Scroll to: Reset the Home Screen and Apps to their Original Layout

1. Go to: Settings
2. Tap: General
3. Tap: Reset
4. Tap: Reset Home Screen Layout
5. Then... Add the apps back

Thanks for your feedback & you're welcome.