I can provide some information on this topic.
there was no public evidence or verified reports indicating that President Joe Biden had taken a cognitive test. In the past, President Biden has faced scrutiny from some critics regarding his cognitive abilities, and some have called for him to release the results of a cognitive test to address these concerns.
It's worth noting that cognitive tests are not a standard requirement for presidents or public officials, and whether or not to release such information is ultimately the decision of the individual involved. In the United States, presidents' health information is often disclosed to the public, but specific details about cognitive test results may or may not be included.
It's not uncommon for political figures to undergo medical evaluations, and President Biden's health, like that of any president, is subject to regular assessments by medical professionals. However, the decision to release specific health information, including cognitive test results, is generally up to the individual and their medical team.
Ultimately, the issue of cognitive fitness can be a contentious topic in politics, and opinions on the matter may vary depending on one's political perspective. It's essential to rely on verified information and consider multiple sources when forming opinions or discussing matters related to public figures' health.