How to pair a Samsung tablet

You would activate Personal Hotspot and you can see your phone on the tablets wifi screen (the wifi name is the name of the phone)

See: How to set up a Personal Hotspot on your iPhone or iPad - Apple Support

And: If Personal Hotspot is not working on your iPhone or iPad (Wi-Fi + Cellular) - Apple Support

And: Use Instant Hotspot to connect to your Personal Hotspot without entering a password - Apple Support

"Pairing" refers to bluetooth. You can not pair an iOS to another computer/tablet/phone via bluetooth.

You don't.

Why do you need to pair it?

Very helpful