iPad Pro extended display

If you use a newer Mac and use a more recent iPad model you can attempt to use the Apple SideCar feature.

Sidecar Supported hardware

Sidecar requires Mac with Skylake processors and later models, and iPad models that support Apple Pencil.

Sidecar-supported Mac models:

• MacBook introduced in 2016 or later

• MacBook Air introduced in 2018 or later

• MacBook Pro introduced in 2016 or later

• Mac mini introduced in 2018 or later

• iMac introduced in late 2015 or later

• iMac Pro introduced in 2017 or later

• Mac Pro introduced in 2019

Sidecar-supported iPad models:

• 12.9-inch iPad Pro

• 11-inch iPad Pro

• 10.5-inch iPad Pro

• 9.7-inch iPad Pro

• iPad (6th generation or later)

• iPad mini (5th generation)

• iPad Air (3rd generation or later)

Failing some or all of these hardware requirements, there are apps in the iOS App Store for extending a computer's display to an iPad.

Look at

Duet Display

Air Display

Best of Luck to You!

No.

The iPad/iPadOS can only mirror its own display.

Sorry.