A very simple data pack that allows for ALL drowned to drop Tridents.
I designed this data pack so that me and my players could still get tridents on a non-peaceful world with mob spawning turned off (limited drowned spawns). Hopefully it can help you as well if you're running into issues or just want this QOL feature in your game.
The default rate is 1/200. You can change this in the drowned.json file. 1/200 is written as 0.005 (out of 1) in this context.