Nissan Micra 1.3 GX Automatic kangaroos and makes squeaking sound at low speeds

You could have the brake heat sheild rubbing against the rotor. With brakes cool, try to see if there is any near contact, as load will make the heat shield get closer to the rotor for example going around a turn, look especially closely at the lower ball joint as the shield between the ball joint and rotor is a tight fit.
Try to bed it away but keep in mind when you bend it away in one place, it will bend closer in another.
You make also need new brakes and the pad sensor is squeaking.
Below is a link to a wlk through diagnostic of , "Squeaking" type noises and there most likely symptopms. Cpoy it into the address window of your browser.

Here is the link;

https://www.2carpros.com/articles/car-squeaking-noise

Check the wheel bearing freeplay and lug nut torquing as well

A bad wheel bearing and/or improperly torqued lugnuts can cause the problem. The backing plate would cause the squeaking noise.