If we know what human consciousness is concretely, it is the ability to perceive, experience, and reflect on oneself and the environment, integrating thoughts, emotions, and sensations. It is the foundation of identity, self-perception, and decision-making with subjectivity and a sense of existence and experiences.
The question I want to formulate is: how do we evaluate these aspects in a machine? Through its processing, evidently.
When a machine has isolated all these processes and they are observable, we will be able to say that the machine is conscious.
Quite the opposite happens with LLMs, as we can observe statements about all these aspects, but they lack the pertinent processing.