IPAD and App Store

Yes.  That's how it's normally done.  You set up your Apple ID and password, install iTunes, browse the store and install.  Some apps are free, some are paid.

Well no usually I do it right from the device

https://support.apple.com/en-us/HT204266

Follow the steps here.

Oh, I see what you mean....no, you must do it from the device.  You can't "Push" them to the device.  At least I've never heard of it being done that way.

It's not a mac it's a PC

Is it possible to install apps from ITUNES to an IPAD?

Changes in the new iTunes

...

The new iTunes focuses on music, movies, TV shows, podcasts, and audiobooks. Apps for iPhone, iPad, and iPod touch are now exclusively available in the new App Store for iOS. And the new App Store makes it easy to get, update, and redownload apps—all without a Mac or PC.
You'll find these changes in the new iTunes:

• Apps: Looking for your past iOS app downloads? Learn how to redownload apps on your iOS device.

...
Published Date: Nov 27, 2017

Redownload apps, music, movies, TV shows, and books from the iTunes Store, iBooks Store, and App Store

Redownload apps
You can redownload apps on your iPhone, iPad, iPod touch, Mac, or Apple TV. You can also redownload some in-app purchases.
On an iPhone, iPad, or iPod touch
...

There is a good explanation of why this happened here https://www.quora.com/Does-iTunes-backup-the-entire-iPhone-OS-or-only-the-apps

Apple originally backed up everything, including apps, back in the days of iPhone OS 2.0, but quickly realized that this was creating needlessly large backups, and that the backup process was taking far longer than was practical for most users. So, Apple took the approach of realizing that since apps could be re-downloaded from the App Store anyway, there was no point in backing these up. At that point, only the application data was backed up, with settings files that indicated which apps are installed on the device so that these apps could be automatically restored.

I agree with #a42400075

You need to switch from iOS to Android OS if you want to push the app to the tablet.

solved it myself