roughly 50 and 50 for FY 22, the FY 23 is more unknown as they could have put that to allow for those graduating in May/June to be selected and for any overages to be pushed to FY 23. If they have 50 more spots for SNA to ship to OCS for FY 22 you don't pick just 50 you pick 50+x, then once the shipping goal is met the "x" is assigned to FY 23. What it will probably look like is a certain number will have OCS dates in FY 22, and the rest "extra" in FY 23 and if a person drops from the FY 22 group a FY 23 will be asked to cover that spot.
or..... they could really rob Peter to pay Paul and jack things up for the next year, and yes that has happened before, it was a fiasco.