So this is the problem with 0791 now, by this generation, the CSSF Starfleet's military spending has long been reimbursed by local enterprises. In other words, Starfleet had long since transitioned from a fleet owned by all citizens to private starfleets owned by conglomerates.
The officers of the 0791 Starfleet, from top to bottom, are Takamanohara's former subordinates. Although every company has various corporate fleets, security companies, mercenary groups, military contract contractors.
But if the high command of the 0791 Starfleet, who are remnants of Akai Tengu, really took the opportunity when the security system went offline and decided to nuke Night City with a bunch of mess like nuclear bombs, satellites, the moon, and so on, it would indeed be quite a headache.
In short, according to the analysis intelligence feedback from Eighteen's network scan, Night Walkers and Akai Tengu are fiercely battling in the Tokyo Underground City.