The following is the April 25, 2022, Congressional Research Service In Focus report, Nuclear-Armed Sea-Launched Cruise Missile (SLCM-N).
From the report
In its FY2023 budget request, the Navy eliminated funding for research and development into a new nuclear-armed sea-launched cruise missile (SLCM-N). The Navy indicated that the program was “cost prohibitive and the acquisition schedule would have delivered capability late to need.” According to the Navy, this cancellation would save $199.2...
https://news.usni.org/2022/04/27/report-to-congress-on-sea-launched-nuclear-cruise-missile