That makes no sense

Many other countries have that. It’s like not giving you admin credentials before you contract start. But there’s no credential, the admin power comes from talking. And as a manager of managers, they has to restrain themselfes.

Respectfully, why not? That's the whole point of campaigning. I seriously hope an incoming administration has a plan before they get to office. "I wouldn't change anything" fortunately doesn't seem to win elections when everything's sideways.

Campaigning is customarily done before elections, not after.

Campaigning is done right happens between elections. In most countries you only have 4/6 weeks. As Kim Campbell of Canada famously said an election is not the time to debate issues. Now the US has a much longer campaign period.. and elections every 2 years. They are always campaigning.

I hope that the incoming President is not campaigning at this time, nor at any time in the future.

Every US President is constantly campaigning. Not necessarily for his own re-election but to create public pressure on Congress to support his agenda, and then to get votes for his endorsed successor.