Chosen Solution
I am about to buy a replacement display to determine whether or not the display is causing my device to appear dead. However, in order to be able to return the display if that´s not the issue I am trying to figure out if the display would work without attaching faceid and just plugging in the two display flex cables. Thanks.
Yes, to try if the screen is working alright you only have to connect the 2 flex cables from new screen to the logic board. No need to instal frontspeaker. (Face id is not attached to the screen, so to test new screen you don’t have to transfer frontspeaker to new screen)