Set instant pot to SAUTE (normal) function. Add ghee/lard/tallow to the pot and let it melt.
Add onions to the pot and sautée until soft and golden.
Stir in carrots and cook until soft.
Add meat to the pot, sprinkle with cumin and coriander seeds, barberries, salt, pepper and stir.
Add rice, spread it in an even layer and season with salt. Add bay leaf.
Put heads of garlic into the center of the rice and add water to cover the rice.
Set your instant pot to pressure cooker function for 45 minutes.
Once finished, do a natural pressure release and let the float valve go down on it's own. (can take about 15-20 minutes)
Remove bay leaf and garlic from plov. Squeeze out the garlic pulp into plov and stir rice, meat and vegetables gently to combine.