Just got this in my inbox, from USCIS:
We recently determined that we needed to select additional registrations to reach the FY 2022 numerical allocations. On July 28, we selected previously submitted electronic registrations using a random selection process. The petition filing period based on registrations selected on July 28 will begin on Aug. 2 and close on Nov. 3. Individuals with selected registrations will have their myUSCIS accounts updated to include a selection notice, which includes details of when and where to file.
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source https://www.reddit.com/r/immigration/comments/otzzca/additional_h1b_selections/