Most of those wayspots are near the school grounds but is more likely tied to the other LGU properties rather than being directly part of the school property.
The link above and one other document support that Afi Park is inside the school property. If you think this is incorrect, showing other elements in the supporting photo may provide more context. It is also worth noting that parks inside schools are not that uncommon here in the Philippines, it would still be subject to the rejection.
Additionally, mistakes in reviewing may happen and approvals are not a stable benchmark for what is currently eligible/acceptable.