There are a few publications by people with some connection with Neuralink. For example:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6914248/

(Elon Musk is author of this publication)

https://pubmed.ncbi.nlm.nih.gov/34140486/

https://pubmed.ncbi.nlm.nih.gov/33955717/

https://pubmed.ncbi.nlm.nih.gov/33894832/

https://pubmed.ncbi.nlm.nih.gov/33784612/

https://pubmed.ncbi.nlm.nih.gov/33236720/

https://pubmed.ncbi.nlm.nih.gov/33080229/

https://pubmed.ncbi.nlm.nih.gov/31996696/