According to information released by Apple itself, this update has as its main highlight the resolution of audio problems, thus allowing to use of the Handoff to transfer the audio to the HomePod.
With that, it is clear that the round in question did not bring news when we talk about news, something that was seen in Beta 3 with the offer of the included features for Siri and the automatic silencing of the built-in iPad microphone when the Smart Folio was closed on Beta 2.
However, it is worth remembering that, as it has a Beta classification, the installation of this type of distribution is not recommended in main use devices, considering that possible bugs may occur, thus hindering the daily use in certain situations.
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If you still want to participate in iOS 14.5 in the Public Beta, just go to the official website of the Apple Beta Software Program (link below) to get more information about the program and sign up to start receiving test updates for Apple devices.
Source: developer.apple