Military airfields aren't reporting their TAFs in windy. All of them obviously have current TAFs available on aviation weather and other sources, but only civilian airfields showup. Here's an example of NAS Corpus Christi, TX (KNGP):
AviationWeather.gov:
https://aviationweather.gov/data/taf/?id=KNGP&metar=yes
Windy:
https://www.windy.com/airport/kngp?radarPlus,27.693,-97.291,8