I’m not sure that I fully understand your latest set of questions, but I believe you might be asking for clarification as to how iCloud backups actually work…
You initial iCloud backup includes all files and data that are not already synchronised with iCloud storage - including your iPad settings. While App-data is included in the backup, for efficiency the Apps are not included within the backup; instead, a record of the installed Apps is included within the backup - and this record is used to trigger automatic download and reinstallation of Apps if the backup is used to to restore the iPad.
Subsequent iCloud backups are effectively incremental. Each time the iCloud backup process runs, changes to files and data are backed-up to the existing iCloud backup; new data and files are added, while deleted data is removed from the iCloud backup.
iCloud does not maintain multiple full backups of any single device. This strategy provides a very fast/efficient backup of your device(s).
If you wish to keep multiple full backups of your iPad, you’ll need to use a PC (with iTunes installed) or Mac (with iTunes or Finder) as appropriate the installed version of macOS). Having created a device backup, it will need to be manually archived prior to creating a new full backup of the device. In addition to lack of automation, the time required for each backup will be considerable - in direct proportion to the amount of locally stored data.
You should also be aware that neither iCloud nor iTunes backups include installed Apps or externally sourced media. References to Apps are saved - permitting automatic reloading of Apps from the App Store if they remain available. Externally synchronised media must be reloaded from source.
I hope this insight and clarification proves to be helpful.