recover lost data on ipad

Hello ~ Have you been backing up regularly? This may help but more details would be best:

Restore your iPhone, iPad, or iPod touch from a backup

~Katana-San~

What - or if - you can recover any lost data will largely depend upon what has happened. If you can describe what you have lost - and in what circumstances - contributors here may be able to offer appropriate information or guidance. In absence of more information, it is impossible to guess your situation.