PS4 Pro uses a dynamic resolution with the lowest native resolution found being approximately 1152x1800 and the highest native resolution found being 1920x2160. On PS4 Pro a form of temporal reconstruction is used that can increase the resolution above the natively rendered resolution. The maximum resolution that can be reached with this temporal reconstruction technique on PS4 Pro seems to be 1920x2160. The PS4 Pro appears to downsample from this resolution when outputting at 1080p.
Xbox One X uses a dynamic resolution with the lowest native resolution found being approximately 2304x1800 and the highest native resolution found being 3840x2160. On Xbox One X a form of temporal reconstruction is used that can increase the resolution above the natively rendered resolution up to 3840x2160.