https://wccftech.com/how-to-download-ios-13-beta-6-without-developer-account-on-iphone-ipad-ipod-touch/

We will show you right now, this very moment, how to download iOS 13 beta 6 or iPadOS 13 beta 6 on iPhone, iPad, iPod touch without a developer account with Apple.

Apple released the sixth beta of iOS 13 and iPadOS 13 a few minutes back and developers can jump in on the action immediately over the air. If you are a public beta tester, then you might want to wait at least 24 hours for the updates to make it onto your device. Some people find that absolutely fine, some find it infuriating. If you’re from the latter category and believe you should download iOS 13 beta 6 or iPadOS 13 beta 6 right now, then you must grab hold of the iOS download profile that is meant for developers only.