What can I do to keep my apps on my iPad 2022 and to delete most of the apps on the iPad Pro 2018?

Every user of Apple devices should have their own AppleID. This is essential to maintain intended separation of activities and to avoid unintended sharing of sensitive and data. Similarly, you should properly prepare the iPad that you intend to give to your Companion. Once properly prepared, your Companion can set-up the iPad as best meets their own preferences and needs - and should you choose to do so, you can share purchased Apps and Apple service subscriptions using Apple's Family Sharing.

Prepare the iPad

This step is essential to both ensure that your own personal and sensitive data private - and removes the Activation Lock that sooner or later will otherwise cause issues:

What to do before you sell, give away, or trade in your iPhone or iPad - Apple Support

Set-up the prepared iPad

Set up your iPhone or iPad – Apple Support

How to create a new Apple ID – Apple Support

Family Sharing

Family Sharing - Apple

Set up Family Sharing – Apple Support

Share App Store, iTunes Store and Apple Books purchases with Family Sharing – Apple Support

https://www.imore.com/how-set-up-family-sharing-iphone-ipad

hey,

Because you have decided to give you iPad Pro to your companion just log out from your Apple ID from that device (iPad Pro),after that your iPad and your companions iPad will not work together so you can delete what every program you want from your iPad Pro but it will not get deleted from your iPad 2022.

Feel free to ask questions if you have any dought regarding this.

Thanks.

You're very welcome.