You could be a brain in a vat - what you experience in that case would effectively be a simulation running on wetware instead of silica. But that still wouldn’t change the fact that what you’re experiencing is happening right now from your subjective point of view. Even if this were just a pre-recorded memory from someone else, it still feels like the present moment to you.

Everything you perceive could be smoke and mirrors, completely fake - but the one thing that remains undeniably true is that it feels like something, not nothing. Even a psychedelic trip, as bizarre or unreal as it may seem, is still just another appearance in consciousness. And for that to happen, your biological body needs to be alive. If you’re dead, there’s nothing left that could have - or host - that experience.