Apple has updated its special enterprise focused version of iTunes that still has a built in app store for those who need it.
iTunes 12.6.4.3 have been quietly made available in an apple supported document related to deploying iPhone and iPad apps in a business environment with iTunes on MAC or Windows PCs.
The update version doesn’t include new release notes, so it is like a minor update with minor bug fixes and stability improvements.
Apple removed the app store in iTunes 12.7 last September but it released iTunes 12.6.3 shortly afterwards for business customer or anyone who might still need to use the Desktop software to install iOS app.