I did answer your question: presidents wield a ton of authoritative ability and they definitely don't have the constitutional ability to enact 'laws', but this administration and every other has great range to act within what they feel is the best thoughts of public interest through creative use of "mandates", "decrees", etc. It's a slippery legal slope for sure but that's nothing new.
The Constitution defines treason as 'levying war' against the US or 'adhering to the enemies of the US, giving them aid and comfort'. Executive orders to require vaccination are not a form of treason by any legal standard.