https://wccftech.com/download-ios-13-4-ipados-13-4-changes-release-notes/

It's here, you can now download iOS 13.4 / iPadOS 13.4 beta for both iPhone and iPad, respectively. You can download it without a developer account too.

After floating iOS 13.3.1 / iPadOS 13.3.1 to the public just a short while back, Apple has stepped things up a notch and has released iOS 13.4 and iPadOS 13.4 beta for both iPhone and iPad. The update is packed with some great news features which we are going to highlight momentarily. But first, we would like to inform our readers that this update is meant for developer-only, for now. If you are a non-developer, you can still download iOS 13.4 / iPadOS 13.4 beta onto your iPhone or iPad. It is just a simple case of grabbing hold of the iOS configuration profile and installing it on your iPhone and iPad. But before you do that, please backup everything using iCloud, Finder or iTunes. Once you are done, download the iOS configuration profile from this link and install it straight onto your device. You will be required to restart your iPhone or iPad, after which you can grab the update by going to Settings > General > Software Update. Tap on Download and Install once the latest beta update shows up.