You may be aware of some of the work done by the U.S. Senate, I believe, looking at the availability of the P-8. They had some challenges early on with making sure they had the sustainment of parts necessary to keep it in the air as often as desired. The U.S. Navy has actually fixed that problem, so they are at 80% or above right now.
On October 17th, 2023. See this statement in context.