The following is the Jan. 5, 2021 Congressional Research Service In Focus report, A Low-Yield, Submarine-Launched Nuclear Warhead: Overview of the Expert Debate.
From the report
The Low-Yield D-5 Warhead
The Trump Administration developed a new low-yield version of the W-76 warhead for existing submarine-launched Trident II (D-5) missiles. Unclassified sources state that the existing W76-1 warhead has an explosive yield of around 100 kilotons. The National Nuclear Security Administration (NNSA)...
https://news.usni.org/2021/01/06/summary-of-low-yield-nuclear-warhead-debate