Just so everyone knows, you can't really transplant dead organs (at least not as safely or with the success of live organs).
They can only use your organs if you die in a hospital setting. They will keep pumping blood to your organs after you die to keep them "fresh" and "alive."
Post-death organ transfer exists but is way more risky than an organ that was recently in a living, functioning body.
So if you've ever considered it, keep in mind that you have to die at a hospital for it to happen, and even then, they're still technically forcing your body to be alive to keep these organs alive.
Source: Friend who lost his leg to amputation during a COVID-coma. They didn't think he would make it. He woke up in the donor ward. EDIT: Just to be clear, this happened during peak COVID before the vaccines when bodies were just piling up everywhere. I don't think a coma patient waking up in the donor ward is a normal thing, I think it happened because COVID was a fucked up situation and people were overwhelmed.