I only eat canned tuna in brine, I can get it everywhere so I ignore the other kinds. I do this on and off carnivore. I so don’t need all the carby sauce or vegetable oil that is in the other cans galore.
I only found tuna like this so I don’t eat any other fish canned, only tuna, very rarely.
But it’s up to you and amounts matter too though it shouldn’t on carnivore but well, few people eat zero plant matter. I never saw the type you described, it may be better than the options here… But I dislike when they put soy or whatnot into my food. If I want to eat soy, I will buy soy (fat chance). Some tiny vegetables, I surely would have no problem with it on my default carnivore-ish. I wouldn’t touch it now but it’s short-term. You are you with different circumstances.
So, amounts… I would totally handle some tasty tomato sauce (as I did in the very beginning) if it wouldn’t be so damn much for some little fish. And that’s for carnivore-ish only, I don’t call eating tomato sauce carnivore at all, no matter how little. But we all have our other definitions and allowances and some of us don’t even care about labels and belonging.