Can not find top module in vivado project

[hoanbk2811]

I've done built this project on u280 platform. however when opening the vivado project generated from vitis/v++, I can not find the top module name "pfm_top_wrapper". Also, I see that GT ref clock of cmac_krnl is not assigned to physical clock pin, but the project still can be built.
Could you please help me understand this?
Thank you.