According to SpaceX's website, it does not announce a NROL-76 launch in mid-April. However according to other sources such as the NRO and spaceflightnow announce that a Falcon 9 will launch the satellite April 16. Since the NRO satellites are classified, and SpaceX is a private company, will the launch be shown live?
SpaceX confirms this will be an LZ-1 landing.
Webcast will cut off launch coverage as usual for NRO missions (like we see with ULA), but will continue for booster landing coverage.
For the SpaceX website - in the past the "upcoming launch" part of the manifest was often shown/updated just few days before the planned launch date. They seem to not show any info when there is still large probability of date change.