So my AirTags which I set up on my iPhone don’t show up on my iPad, why not?

I am having the same problem except the airtag is not showing up on my find my phone on my iPhone 11 (14.5.1) or MacBook. I bought a 4 pack of the tags, only set 1 up so far. My phone helped me set it up, name it, etc but now its not showing up anywhere! Are we suppose to register these with apple?

Requires iPhone SE, iPhone 6s or later, or iPod touch (7th generation) with iOS 14.5 or later, or iPad Pro, iPad (5th generation or later), iPad Air 2 or later, or iPad mini 4 or later with iPadOS 14.5 or later.

Buy AirTag - Apple

so make sure you update ipadOS