ipadOS is a platform developed by Apple Inc. Among other things, on this platform are running browsers, applications and email clients. See below the software that is supported by ipadOS.

By the way, maybe you are looking for ipadOS user agents?

Browsers:

• Chrome
• DuckDuckGo Browser
• Firefox for iOS
• Mobile Safari UIWebView
• Opera Mini
• Safari

Applications:

• Facebook App
• Facebook Messenger
• Google App
• Line App
• Pinterest App

Email Clients:

• Apple Mail