To be clear, qualified immunity is entirely a judicial branch legal principle, and not a law that was passed by the legislative branch.

If laws are created in this space than the judicial legal principle MUST to be reworked/updated/changed to accommodate it. The law is a higher priority.

There IS a law (Section 1983), which stood whole for almost a century, before the Supreme Court largely gutted by inventing this legal principal out of thin air.

"while the courts judge if they are followed or not."

Or in the case of qualified immunity, create it out of thin air.

It's not created out of thin air. There is a lot of reasoning and background on it. Whether I agree with it or like it is entirely different.

Is there a law granting this power? No. It was created by the court.

I can reason about something all I want, but it doesn't make it the law.