If Apps are missing upon restore, perhaps you haven’t waited a sufficiently for the App-restore process to complete. Are the Apps showing as “waiting”, or are all traces of the missing Apps absent from your Home Screen?
Having restored your Apps and data to your iPad, in rare circumstances the download and installation of associated Apps can appear to stall.
If Apps are “waiting”, try a long-touch (i.e., touch and hold) of any App that appears to be stuck; next select Prioritise Download. This will usually kick-start and complete the App installation process.
If instead all expected Apps are missing, you may need to erase the iPad and repeat the restore from backup. You should note, however, that if you have overwritten the existing iCloud/iTunes backup since restoring the device, you will have lost the previously saved-state - and will have to setup again and reinstall Apps individually.
Restore your iPhone, iPad, or iPod touch from a backup - Apple Support