OK, let's back up a bit.
After a more careful reading, your initial message goes:
" it doesn't show for example: Microsoft Office and all its software, calculator, etc."
The correct answer would be:
Microsoft Office is not part of Windows, there is no such a component, and if the Office was installed into this image and recaptured (WIM), it won't be removable by NTLite.
Get an official clean ISO from Microsoft
here.
Calculator should be listed, but it's not as your OS (1809 LTSC) doesn't have the app for it.
OK, added that support, sending you a private link to download the upgrade.
Important note about the apps that are installed after setup, which includes Skype as far as I know - if not listed in the apps on the image.
Make sure to disable in image Settings page before Applying:
"Pre-installed OEM apps"
"Automatic installation of sponsored apps (Consumer Experience)"
It also includes and can be explicitly disabled as well:
"Pre-installed apps"
"Automatically install suggested apps"
Let me know if you find any other missing from the list and is not just a shortcut or autodeployed after setup.
Thanks!