All assessments for all endorsements? F no. They can sign all the ones in the Specific NVIC IF they meet the qualifications described in that NVIC.
More relevant is the NVIC(s) for the specific endorsement(s), ie page 1 of Enclosure (2). If one cannot be bothered to read that they should not be signing off assessments.
Just read the damn NVICs. If you don’t think you are qualified then don’t sign.