There hasn't been any case that's established anything.
Pavia sued regarding his eligibility because he came from JUCO. He got an
injunction that allowed him to play. The judge did not rule that JUCO seasons don't count. The ruling was essentially that JUCO seasons
might not count, so if Pavia was not allowed to play he might be irreparably harmed in the case he is right.
As a result the NCAA granted a one-time eligibility waiver for only the 2025 season to athletes who had at least one year of JUCO or NAIA that would have counted towards their eligibility. They essentially did this to avoid having hundreds, maybe thousands, of athletes sue them hoping to get similar injunctions.
At the same time the NCAA appealed the injunction. The appeal was dismissed as moot because of the blanket waiver the NCAA granted which would apply to Pavia. Pavia's lawsuit apparently is still going in the hopes of changing JUCO/NAIA eligibility rules permanently but there's been no ruling.
Joey Aguilar recently sought an injunction for next season on similar grounds and was denied.
The NCAA previously denied Tennessee’s request for what would be counted as a seventh season of eligibility for Aguilar.
www.nytimes.com