I don’t believe Ukraine has a navy per se, and what munitions they put on their improvised sea drones likely aren’t our standard naval issue described here.
Where the US Navy is falling apart is on drone defense. Shooting down $250 Houthi missiles with $5 million SM-6s is a good way for the US to run out of weaponry and go broke at a pretty fast clip. We desperately need cost effective drone defenses.