How to
How to put the apps I already have downloaded on my iPhone onto my iPad
iPad Pro 12.9-inch, 3rd Gen, Wi-Fi, Cell
You will have to redownload each app from the App Store on your iPad (since it may be slightly different from the iPhone version). There should be no additional charge as long as you are using the same Apple ID on each device. See the "How to redownload apps on an iPhone, iPad, or iPod touch" section in:
Redownload apps and games from Apple - Apple Support
