I read this statement in the IRCC memo which was released in March 2022.
"FHS rounds which previously targeted CEC clients have been paused since Sept 20th, 2021. As of Dec 29th,2021 there are approximately 75000 FHS persons in the inventory, which is around 20,000 higher than the 55,900 admissions level for 2022. No new FHS intake is required for at least first half of 2022. Small rounds in late 2022 would be required to meet the 2023 levels."
Next update in their memo was "The current inventory of FHS clients remains sufficient to meet the category admission goals for 2022. There are approx 58000 persons in the FHS inventory with a planned admissions target of 55,900. Additionally there are over 21000 persons in the landing inventory with over 16,000 admissions to date in 2022". The department will be conducting generic round of FHS candidates every two weeks, which will be consistent with average number of invitations issued pre-pandemic " which is feel is based on qouta available (avged)
What this would mean is that 20,000-21000 additional inventory would count against the 75,000 FHS quota for 2023 as they probably wouldn’t admit them in 2022 , which means they only need to select 55,000 people for 2023 from FHS since they have 20-21k surplus. If you space out this quota between bi-weekly draws the avg number comes out to be 2000-2300 persons for next 12 months. If they did this one with 1500 surely they would have to increase the draw size somewhere to balance out but it won't be that big of a draw based on this assessment , or they would put this qouta(1000 every month to may be the TR/PR program to be released later) and assumption they continue doing bi-weekly draws.