Apple has released the third iOS 10.3.2 beta for testing on iPhone, iPad, and iPod touch. The version numbers also suggest we should only see under-the-hood bug fixes and security improvements in these releases when ready.
iOS 10.3.2 beta 3 is currently only available in beta for registered developers. The public beta version of each update usually follows a few days after the developer version if not the same day. tvOS and watchOS are also available as beta updates, although public beta programs are not available.