Downloaded latest update but won’t install

Hello carole107,

Follow the steps from the article If your iPhone, iPad, or iPod touch won't update - Apple Support:

After following the steps that relates to your issue, make note of the steps below if the issue persists:

Remove and download the update again

1. If you still can't install the latest version of iOS or iPadOS, try downloading the update again:

2. Go to Settings > General > [Device name] Storage.

3. Find the update in the list of apps.

4. Tap the update, then tap Delete Update.

5. Go to Settings > General > Software Update and download the latest update.

If you don't see the update in the list of apps or if the issue happens again, you need to update your device with your computer:

Update your device using a Mac with macOS Catalina or later

Update your device using a Mac with macOS Mojave or earlier, or a Windows PC

Best Regards.