From a technical standpoint there is no issue with the inlet being rated higher. 32A inlet will carry anything from 0 A to 32A just fine and that includes the 30A the shorepower would provide.
The weird thing is that well the US is never uses 32A. The US (and most of Americas) is usually 30A @ 120V, 50A @ 120V, or 50A @ 120/240V split phase. Europe
(and most of the rest of the world) is normally 16A or 32A @ 230V.
Now technically the plug being intended for 32A @ 230V usage doesn't matter if it is used in a 30A @ 120V scenario if everything on the boat is wired for that but it is weird.
As long as you are sure all the boat AC systems are 120V not 230V and properly wired then other than it being odd there is nothing wrong. Zero idea why a new boat
would have a non-standard plug like that though.