The beta was released to developers on Tuesday and has the following focus areas:
Please focus testing on the following areas:
• Night Shift preference for automatically shifting the colors of your display to the warmer end of the spectrum after dark
• Siri support for checking Cricket scores, schedules, and player rosters from the Indian Premier League and International Cricket Council
• Dictation support for Shanghainese
• Displaying, manipulating and generating PDFs with system-provided APIs
You can sign up for the Apple Beta Software Program at the link below to gain access to public betas.