Visa slot availability for H1B

I am planning to visit India in November this year and need to get my visa stamped. I submitted my DS160 and the fees as well. While trying to look for available dates for OFC and interview appointments, I am not able to see any availability at any of the locations beyond May 2025. When are slots typically released? Do they only release slots for the next few months? Or are slots already full through the end of 2025 and I have to wait for cancellations to find availability?