If you check your admin console, billing, subscriptions, you will probably see that the new license structure has been pushed out. The notification was sent out in November of 2024 and last night seemed to be a pretty large rollout.
Remember that even if you purchase Education Plus or any other paid for level, users have to have a fundamentals license also.
SKU's have changed, so be careful when using third party tools to assign,
If you need more licenses, you have to contact Google support, not your reseller.
This move is being done as many EDU domains suspend users but do not remove licenses and this is not sustainable for Google.