I cannot find the recycle bin on my iPad

Unlike Microsoft Windows and some other computers, you will not find a single Recycle Bin on your Home Screens. Instead, individual Apps will have their own Recently Deleted folder - that can be accessed from within the related App.

Items on a Home Screen, that are deleted, are simply deleted from the iPad.

If you are unfamiliar with iPad and iPadOS, the iPad User Guide is a rich source of frequently overlooked information about your iPad and iPadOS. The Guide is available both online using a web browser (such as Safari), or as an Apple Books download:

iPad User Guide - Apple Support

https://books.apple.com/book/id1567104892

The Tips App, installed by default on all new models of iPad, provides a brief introduction - and leads you to the User Guide. In case you missed it, here is a link to the Tips App:

https://apps.apple.com/gb/app/tips/id1069509450

Apple also has a huge YouTube Channel - containing videos and feature guidance:

https://www.youtube.com/user/Apple

There are also comprehensive guides for Apple’s main productivity Apps, such as Numbers (spreadsheets), Pages (documents) and Keynote (presentations):

Numbers User Guide for iPad - Apple Support

Pages User Guide for iPad - Apple Support

Keynote User Guide for iPad - Apple Support

There is also a similar User Guide for iCloud:

iCloud User Guide - Apple Support