The ‘We Love VFR’ series by PuffinFlight is excellent!
https://flightsim.to/profile/PuffinFlight/uploads
Global AI Ship Traffic, ‘GAIST’ for short! It’s now been updated to version 3 
https://forums.flightsimulator.com/t/global-ai-ship-traffic-v2-native-version-and-great-lakes/459135