The Sixers' delay in making a further announcement about a second foot surgery for Joel Embiid appears to be Embiid himself, per friend of the site, CSN Philly's John Gonzalez. Gonzo notes that Embiid still hasn't had another surgery on that broken right navicular despite the Inquirer's Keith Pompey's report from July 12 that the Cameroon native would miss his second-consecutive season and have the procedure "seven to 10 days" from that announcement.
It's been almost a month to that day and the Sixers' haven't said anything more about Embiid's status going forward, nor has he actually had that surgery.