Bittersweet522 Said:
"I want to reinstall the Apple-provided Weather app. From those I’ve tried, the Weather app that came with my iPad is NOT available in the App Store"
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Reset the Home Screen Layout:
If the Messages widget has gone missing somehow, then you need to reset the Home Screen Layout...
Go Here: Move and organize apps on iPhone - Apple Support
Note: You'd have to add back all the widgets that you can recall being back on there. So, make note of them.
Scroll to: Reset the Home Screen and Apps to their Original Layout
- Go to: Settings
- Tap: General
- Tap: Reset
- Tap: Reset Home Screen Layout