Personally declaring your achievement to the general public is not the same as the acceptance of the results of a clinical trial in a peer reviewed publication.
While it isn’t illegal for Neuralink to not have registered its clinical trial, not doing so violates fundamental ethical guidelines for biomedical research—notably the Declaration of Helsinki, a cornerstone statement of ethical principles for medical research involving humans.
“What truly puzzles me about this is not the technology itself but the way of communicating scientific news,” said Marcello Ienca, a professor of ethics of AI and neuroscience at Technical University of Munich, who stressed information about Neuralink and its work is being disseminated “through casual social media updates” rather than traditional outlets for science like peer reviewed publications, public repositories or even simple pre-prints.
Elon Musk has publicly suggested that Neuralink will utimately produce products including “Telepathy,” which would allow users to control a phone or computer “just by thinking.’ He also envisions restoring sight to the blind as well lost mobility to people with paralysis. More generally, Musk hopes, Neuralink technology will be used to enhance human memory and raise the human intelligence quotient (IQ) in order to contend with the presence of artificial intelligence. Previously he had been very vocal about the dangers of AI.

Neuralink has also been called out over its use of animals in experiments and questions have been raised regarding its regulatory board governing its animal research. The company has denied any wrongdoing and says that it is “committed to working with animals in the most humane and ethical way possible.”
SOURCE MATERIAL : https://www.forbes.com/sites/roberthart/2024/01/30/elon-musk-teases-first-neuralink-products-after-company-implants-first-brain-chip-in-human/ Jan 30, 2024
SOURCE MATERIAL : https://www.forbes.com/sites/roberthart/2023/09/21/elon-musk-says-neuralink-could-slash-risk-from-ai-as-firm-prepares-for-first-human-trials/?sh=300741eb2956 Sep 21, 2023
SOURCE MATERIAL : https://time.com/6310076/elon-musk-ai-walter-isaacson-biography/. SEPTEMBER 6, 2023
SOURCE MATERIAL : https://www.reuters.com/technology/musks-neuralink-faces-federal-probe-employee-backlash-over-animal-tests-2022-12-05/. December 6, 2022