SpaceX plans to launch 53 Starlink satellites into Shell 4, with an eventual 540 km circular service orbit at 53.22° inclination, on 2022-04-21 at 17:51 UTC. This will be the 12th flight of Falcon 9 booster B1060, which will join B1051 as the fleet leader, with 12 flights. Among its 11 previous flights have been 8 Starlink launches.
Here is a pre-flight preview from Everyday Astronaut.