We have released the TX_MPU example based on the Module_Manager but it is only for IAR EWARM, you may try to inspire from it to create your KEIL project.
In the few coming weeks, the X-CUBE-AZRTOS L5 (CM33-based) will be released, it will contain the same example for IAR, KEIL et STM32CubeIDE.
otherwise you can have a look at the example provided by MSFT