In a large bowl, whisk together the hoisin sauce, soy sauce, sugar, five spice powder, garlic powder, and beet root powder if using. Reserve about ¼ cup of the marinade for basting. Add the pork and coat well. If you have time, marinate for 30 minutes or up to overnight.
Preheat your air fryer or oven to 425°F. Place the pork on a rack or parchment-lined tray.
Cook for 20 minutes, flipping once halfway, and baste the pork generously with the reserved marinade.
When the pork reaches an internal temperature of 145°F, remove from the air fryer or oven. Let rest for 5 minutes before slicing.
Slice thinly and serve with rice, veggies, and enjoy.