Well, this is disappointing - new study shows there may not be any organic material that is transferred from Titan's surface to its oceans below. Although I'm not sure how confident you would make this conclusion just on comet hits.
Using the assumed rates of impacts on Titan's surface, Neish and her collaborators determined how many comets of different sizes would strike Titan each year over its history. This allowed the researchers to predict the flow rate of water carrying organics that travel from Titan's surface to its interior.
Neish and the team found the weight of organics transferred in this way is quite small, no more than 7,500 kg/year of glycine—the simplest amino acid, which makes up proteins in life. This is approximately the same mass as a male African elephant. (All biomolecules, like glycine, use carbon—an element—as the backbone of their molecular structure.)
https://phys.org/news/2024-02-saturn...habitable.html
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