even as a president, this wouldn’t be protected under the immunity act, only presidential actions. Speaking to the public, as far as i am concerned is not considered to be a core “presidential action” in the government.
SCOTUS has decreed that SCOTUS alone can determine what is an official act.
while this is true, they still have a basis to operate under. There are certain things that aren’t official acts. Posting on social media wouldn’t be one. There are things that are, and those have absolute immunity (bad) there are also things that have presumptive immunity (which means you have to rule on whether or not these are admissible evidence) and this has had a direct effect on the jan 6th hearing, removing like 9 pages of communication between government officials, which is about all they could remove from the hundreds of pages that were there already.