"the laptop has been authenticated"
That's funny. Did someone dispute that it was a laptop? Did they bring in a laptop expert to say "Yep, that's a laptop."?
Thousands of emails, which represent a small fraction of the contents on the hard drive of the laptop, have been verified as authentic emails.
"The vast majority of the data — and most of the nearly 129,000 emails it contained — could not be verified by either of the two security experts who reviewed the data for The Post. Neither found clear evidence of tampering in their examinations, but some of the records that might have helped verify contents were not available for analysis, they said. The Post was able in some instances to find documents from other sources that matched content on the laptop that the experts were not able to assess." https://www.washingtonpost.com/technology/2022/03/30/hunter-biden-laptop-data-examined/
Also, verifying the emails are authentic does not verify that everything stated on the emails is true.