Taramosalata with seafood in it, shocking, shocking I say. But if you can have warnings on a bag of peanuts “may contain nuts” it seems reasonable. I do wonder why it contains soy though, not something you might expect.
Soy flour to add protein and help bind, soy sauce for flavour, saltiness and colour, lecithin derived from soy used as an emulsifier? I guess there could be others as well. Maybe where it is made soy products are also present as in the “may contain traces of eggs, milk, and tree nuts” type.
I get your point that in processed food many ingredients appear in odd roles. I think you are confusing soy with soy sauce though, there is no reason for soy products to have either the colour or salt of soy sauce, brown would not be attractive as the fish row is supposed to be pink, the salt of soy sauce is added.
Could even contain Soybean Oil as part of the added oil. Sorry as I had never seen this item before so was just musing on why Soy could have been added as many times Soy Sauce is used for multiple reasons including colour in dishes. Even Red Roe is discouraged in what I read were traditional recipes and more beige roe is preferred?? As I have never eaten, seen, or been introduced to the dish I am not sure if this is even correct. Sounds though like a very nice way of using roe and stale bread and disguising the sometimes very fishy flavour some roes have.