We also have electric ferries here in Antwerp and Ostend. I don't think they're hybrid, although it's not clear when they get charged, I would assume during the wait times (about 15 minutes wait and 5 minutes ferrying) but I have not noticed them actually connecting anywhere, maybe I just haven't noticed though. The communication says it can sail for three hours on batteries, so they must charge during the day while operating.
And at my other place around Nantes they're building a new ferry that is supposed to be hybrid electric/hydrogen. I'm not very optimistic on hydrogen though so I don't know. The latest info say the budget has tripled and the delivery has been reported from 2026 to 2030.
Most of them seem to perform opportunity charging (while loading/unloading), using direct rapid charging via pantograph.
See eg https://www.energymonitor.ai/sectors/transport/the-secret-to...
I have also seen designs for ferries to wirelessly charge underwater while docked.
Wireless charging can be quite efficient when the two halves comprise nesting physical features with similar tolerances to actual transformers. But I have not seen this implemented, presumably due to biofouling problems.