Unless this is reported by USNI news, I’m not taking it seriously. Those images prove nothing. The claim that it was an SSN gives it even less credibility.
USNI news isn't exactly a beacon of credibility either, especially when media typically echo the beats that other outlets write.
The linchpin of this WSJ article is the one lone DoD quote which doesn't actually outright confirm or deny the statement by the author, only saying:
"
It’s not surprising that the PLA Navy would try to conceal the fact that their new first-in-class nuclear-powered attack submarine sank pierside,” said a senior U.S. defense official. “In addition to the obvious questions about training standards and equipment quality, the incident raises deeper questions about the PLA’s internal accountability and oversight of China’s defense industry, which has long been plagued by corruption.”
It's possible the author was trying to avoid putting someone at risk by directly quoting a confirmation of the purported event, but everything about the article -- the timeline beginning with inconclusive satellite imagery, lack of anyone quoted on the record saying "yes this happened" and the strange timeline of a nuclear submarine being built at Wuhan at this time (if they meant the SSK-N, it is a bit too early to have expected it to emerge), is all rather sus.