why does my ipad keep losing Wifi connection when the screen times out

If the iPad disconnects when idle (sleep/locked) you may need to verify the your WiFi Settings for each of your configured WiFi Networks - ensuring that they are set to Auto Join:

Settings > WiFi > [WiFi Network / SSID] - tap the “i” icon - set Auto-Join to ON

Unless Auto-Join is enabled, your iPad will not automatically reconnect to the WiFi network when resuming from sleep - or when coming into range of your WiFi network.

Auto-Join is enabled/disabled for each configured WiFi network.

Hi fannie64,

Welcome to Apple Support Communities!

We understand that your iPad is losing Wi-Fi connectivity when your display is locked. Make sure you're running the latest iPadOS in Settings > General > Software Update. Toggle the Wi-Fi button off and back on in Settings. Restart your iPad.

Restart your network equipment, including Wi-Fi and router. If this continues, reset your network settings. We advise on backing up to iCloud or to your computer before you reset network settings. How to back up your iPhone, iPad, and iPod touch can help with backing up. When we reset network settings the following are affected:

* Previously connected Wi-Fi networks and passwords (if you use the iCloud Keychain feature, this will reset this information on all devices that use that iCloud account and Keychain)

* APN and cellular settings (things like international roaming settings or cellular data use for certain apps return to default settings)

* VPN settings

Once you’ve created a backup you can go to Settings > General > Reset > Reset Network Settings. This will restart the device. Check for this behavior once your device has restarted back to your Home screen.

Warm regards.