True, but you have to add previous attempts going back several years. Wasn't Atlas+Starliner actually rolled out to the pad last time only to be scrubbed and brought back for another 6 month delay?
"Although it was originally planned for a 2017 launch,[15] various delays pushed the launch back to no earlier than July 2023.[47] Then on June 1, 2023, Boeing announced the flight was indefinitely delayed, due to problems with the parachute harness and flammable tape on wiring.[105] On August 7, 2023, Boeing announced that it was resuming preparations for a launch, and that it hoped to resolve the issue with the flammable tape by September 2023, and to address the parachute harness issues by November 2023.
The Crewed Flight Test was tentatively scheduled for a launch date of May 6, 2024,[106] but due to a problem with an oxygen valve on the ULA Atlas rocket, the May 6 launch date was cancelled approximately two hours before the planned launch time.[107] The launch has been further delayed due to a helium leak in the Starliner service module, which was originally discovered during the May 6 launch attempt.[108][109]
A launch was attempted on June 1, 2024, for 16:25 UTC (12:25 PM EDT), but was aborted at 3 minutes and 50 seconds prior to liftoff. Starliner successfully completed countdown and lifted off on June 5, 2024 at 14:52 UTC (10:52 AM EDT)."
You are missing ones where it was scheduled, but didn't even make it to the stand because some issue was found. I can't recall when exactly, but at some point it was discovered that the tape used to wrap wires was flammable. So it was postponed, once again.
