Search bar not found on iPad

Simply touch any empty area of a Home Screen with your finger - other than the extreme edges edges or corners of the screen - and swipe downwards to expose the Search dialogue.

I recommend that you review at least some of the early chapters within the iPad User Guide to iPadOS. The User Guide is a rich source of information that will help you get the most from your iPad and its capabilities. Here are links to both the downloadable and online versions of the Guide:

https://help.apple.com/epub/ipad/en/

https://support.apple.com/guide/ipad/welcome/ipados

I hope this both resolves you problem in finding Search - and provides a useful resource for learning all the new gestures and features of iPadOS/iOS.

place your finger on the screen not touching an app icon and slowly move your finger downwards