View race times in Mario Kart 8 Deluxe
Solution 1:
The feature you are looking for does not appear in Mario Kart 8 nor Mario Kart 8 Deluxe, as the race will instantly end as soon as you finish (or as soon as all human players finish in multiplayer). Thus, it does not track the times of computer players.
Only a few Mario Karts have included this feature since MK64, because they stopped waiting for all CPUs to finish. Mario Kart Wii had this feature, but it just estimated a number for all CPUs since the race would be done when the player finished, so it wasn't actually accurate regardless.