Can your mod define vanilla and standardized fish buckets for a fish mod? That mod had non-standard code of fish bucket, resulting in poor compatibility

Not right now, but I can add it.

Thank you for your quick reply!
Considering the request for fish buckets is pretty minority, and I notice that you don't seem to be updating 1.16 anymore, I think you can ignore this request.
Then, could you teach me how to create an item that can generate a fish entity and then turn into a bucket item?