Have you killed tons of Drowned but still don't have a Trident?
Have you spent hours fishing for Nautilus Shells for your Conduit and still come up short?
Here's a couple datapacks to solve these problems.
- Drowned that spawn in Ocean Ruins have an increased chance of having naturally-spawned equipment like Tridents, Fishing Rods, and Nautilus Shells
- Fishing above Ocean Ruins gives you an increased chance of Nautilus Shells
Details:
There are two sizes of Ocean Ruin structure. Small ones are 6x7x7 and big ones are 16x16x16.
Drowned
In order to have a greater chance of equipment, Drowned must spawn at most 14 blocks above and 12 blocks to the side of an Ocean Ruin structure.
Note: Zombies that convert into Drowned will not gain equipment! The Drowned must spawn naturally!
Here's a visualization of the area where Drowned spawn with equipment more often: 
Fishing
In order to have a greater chance of Nautilus Shells, the fishing bobber must be at most 28 blocks above and 6 blocks to the side of an Ocean Ruin structure.
Here's a visualization of the area where the fishing bobber must be to have a greater chance of fishing up Nautilus Shells:
You can check if the datapacks are installed by going to your advancements, then the "connor135246 Datapacks" tab, and then checking for the "Extra Drowned Equipment" and "Fish More Nautilus Shells" advancements.