How to set iPad to automatically backup each day

See this, How to back up your iPhone, iPad, and iPod touch - Apple Support If you connect your iPad to power to charge overnight it is connected to wi-fi, and has been configured for iCloud backup in Settings, it will backup daily. The link provides instructions to configure the settings.

Hi. As far as I know, your device will be backed up once every 24 hours, but it has to be plugged in, locked and on wifi.

You can check when your device was backed up last by going to Settings - click on your name - then click on « iCloud «.