FY 26 starts Oct 1 2025, for OCS purposes those that start roughly after the first week of July would be FY 26 accessions.
It would be odd but not unprecedented to have FY 26 mostly filled at this point, NRC also won't get hard goals for FY 26 until the end of the year so in the past they have tended to be cautious and only fill a percentage until they get hard goals.
There are some things that could be affecting spots that are being taken, my first thought is ISEL, those that are bypassing the board are taking the same spots as people going to the normal board process. The other could be those being redesignated in OCS, that will have more of an impact on smaller designators than it will on larger designators.
In the end you still need to get everything ready to submit because until the board schedule says the board is cancelled it is all just speculation.