President 'autopen' Biden

Has all his auto pen signatures declared null and void by President (no auto pen) Trump. I have often questioned the validity of auto pen signatures for the very reason Trump gave. How easy would it be for some unnamed underling to forge the president's signature? Even more easy if the actual president is mentally incapacitated as we all knew Biden was when he was first elected. Dementia which was very evident as Biden campaigned is a progressive disease. You simply become more and more demented as time moves on. At the end of his term he couldn't remember signing bills and EOs. Likely for two reasons. One he is too demented and two he didn't do it. Someone in the White House used an auto pen.