https://wccftech.com/apple-releases-second-beta-of-ios-14-and-ipados-14-to-public-download-now/

Apple has seen fit to release the second beta of iOS 14 and iPadOS 14 to the public for testing purposes. The latest build arrives two weeks after the first beta was released to the public. The second beta corresponds to the developer beta 3 which was released yesterday. The second public beta is now available to download on all compatible iPhone and iPad models so you can download it right now.

If you're unfamiliar, iOS 14 public beta 2 can be downloaded on your iPhone via a profile that is installed from Apple's Public Beta website. The update is available over the air so it won't be an issue if you're already on iOS 14. However, iOS 14 is crawling with bugs at this stage since it is in the beta phase. Hence, it would be wise to not install it on your primary device as of now.