Shaking while braking

As long as this is not an ABS activation then I suspect the rotors are either not tightened properly or they are otherwise not installed properly.

Here is a guide that will help with this:

https://www.2carpros.com/articles/how-to-replace-front-wheel-bearings-and-seals

Again, if this is an ABS activating when you are pressing the brakes then this bearing issue would not be the cause, but it sounds like this is a warped rotor.

So, the fact that they are new points to an installation issue.

Below is the detail from the manual that will show how to replace this as well. Please let us know what you find, and we can go from there. Thanks