Falcon 9 Block 5 | USSF-xxx ("TH-2")
Classified mission for the United States Space Force. It is possibly a batch of classified LEO satellites based on SpaceX’s Starshield satellite bus, based on locations of ascent rocket stage drop zones being fits with previous SDA Transport Layer launches.
The reminder alerts you thirty minutes ahead. No live coverage has been announced yet, so the file points at this page instead. It is a file rather than a subscription: launch dates slip, and a saved entry does not move when they do.
Awaiting official confirmation - current date is known with some certainty.
Coverage
No press coverage is linked to this mission yet.