It’s not letting me download iOS 15.7

Hello escarlette162,

First, please ensure you're following the process outlined in the following link to back up and update your device, so we can make sure there aren't any issues there: Update your iPhone or iPad

Update your iPhone, iPad, or iPod touch wirelessly

1. Back up your device using iCloud or your computer.

2. Plug your device into power and connect to the internet with Wi-Fi.

3. Go to Settings > General, then tap Software Update.

4. Choose the software update that you want to install. You can choose to stay on iOS or iPadOS 15 and still get important security updates. Or you can choose the option to upgrade to iOS or iPadOS 16.

5. Tap Install Now. If you see Download and Install instead, tap it to download the update, enter your passcode, then tap Install Now. If you don't know your passcode, learn what to do.

If you're experiencing an issue updating your device, please check out this link, which outlines why you may be experiencing an issue updating, and outlines what to do: If your iPhone or iPad won't update

If the update doesn't complete

If you're installing the update, the progress bar might appear to move slowly. The time an update takes depends on the size of the update and the number of files on your device.

When you're updating over the air, keep your device connected to a power source. If your device runs out of power, connect it to a power source and turn on the device to let the update or restore complete.

Learn what to do if your iPhone or iPad appears frozen or won't start.

Thanks!