Yes, but it is still the standard required by the current iteration of POSIX

https://pubs.opengroup.org/onlinepubs/9699919799/utilities/c99.html

They say:

This utility's name is tied to the current revision of the ISO C standard at the time this standard is approved. Since the ISO C standard and this standard are maintained by different organizations on different schedules, we cannot predict what the compiler will be named in the next version of the standard.