No, you don't respect an animal if you eat their carcass, because otherwise it would go to "waste"
You can read from time to time posts from people claiming to be vegans, that they eat animal products occasionally if such product would go to trash otherwise. It's usually said in a context of family members that didn't eat enough of their non-vegan meals, or restaurants that messed up the order.
I have a lot of problems with this approach.
Cynic in me would say that some plant-based people just look for an excuse to finally eat the animal, but I want to be fair for all of these people.
First of - Animal doesn't care what you do with it's remains, there is no respect for the death of the animal, the only respect you're showing, is the one towards other non-vegan humans. Food waste being disrespectful is a concept based on that this "food" could be eaten by other people - which is essentially a speciesist way of viewing the world.
Secondly - It's also a way that very much objectifies animals, in this context they're merely diminished to the concept of "food" that removes any individualism from the killed animal.
Thirdly - It goes hand to hand with a philosophy of negative utilitarianism - the concept of minimizing the amount of suffering in the world and maximising the amount of happiness. And while in theory it can sounds like a good concept, it is deeply flawed from vegan perspective, because it can allow eating animal products or even animal meat in the situation where we think that the live of animal has enough happiness to justify the exploitation of them. And veganism is about avoiding exploitation of animals and achieving, in the end, animal liberation, not some kind of cruelty-free dystopia that still exploit animals.
There is no way that actually justify this, that goes along with vegan principles.