From what my recruiter said/showed me is that they aren't closed, they're just blacked out. My understanding from my recruiter's explanation is that just means the spots for fy23 are to be determined and it's not closed
FY 23 spots won't truly be determined until Nov 22 to Jan 23, until then they will go off a percentage of this years goal which is 286, they already have FY 22 identified plus about 240 already slotted for FY 23.
The dashboard in March could have some better idea about the May board, but really they could wait until before the deadline to make a decision.
It really comes down to does NRC want to fix the issue or just keep pushing it off and giving people OCS dates a year out.
Until NRC formally cancels any board every applicant should continue to get ready for the board, but be prepared for news it is cancelled or delayed.