How do they consider part-time status in grad school for the new loan limits?

I’m in my senior year of under grad and applying for speech pathology grad schools. My earliest start would have to be fall 2026. Some programs are a two year track and some are a three year track. The 3 year are the same number of credits but they take longer to complete, I’m assuming you take less classes at a time. How do I know if loans would pay out the full possible amount? If part time do they only pay half. Not sure how this would work. I was counting on Plus loans and now I can’t. I’m really worried I just spent 4 years of undergrad for a degree that is basically worthless without the grad school degree.