The USCIS will reuse your biometrics if you have reusable biometrics from a prior application, your biometrics appointment was scheduled to after March 18th 2020, and the ASC where it was scheduled had not resumed its normal operations which were disrupted due to the COVID pandemic.
The announcement is with regards to EAD applications, the USCIS made no such announcement with regards to N400. That doesn't mean that they do not "silently" reuse biometrics for N400, but it does mean that you cannot rely on anecdotal evidence you've found elsewhere as a guidance to yourself.
The link is to the official USCIS announcement. I do not consider random people on the internet to be a reliable source or anecdotal data to be a reliable evidence, so unless told otherwise by the USCIS, expect to be required to show up at an ASC for a biometrics appointment.