iOS/iPadOS devices have no actual clipboard that you can directly access.
Anything that is cut or copied is put in a temporary clipbaord that is inaccessible to the user.
The “invisible” iOS/iPadOS clipboard area ONLY stores a single clipping at a time and the clipping will get replaced with something different the next time you cut/copy another piece of text or other item.
If you wish to access this invisible “clipboard” and/or access multiple clipboard items, in the future there is an iOS app in Apple's iOS App Store that can be of help/assistance/usefulness to you.
Look in the iOS App Store for
Paste
https://apps.apple.com/us/app/paste-clipboard-manager/id967805235
This is a monthly or yearly paid app.
Best of Luck to You!