Take the pork chops/fillets/whatever and coat them in a marinade of apple cider vinegar, mustard, thyme (dry), salt and pepper (and garlic optionally). The amount should be just enough to coat them and the consistency almost like syrup.
For instance 2 tbsp mustard, 1/3 cup apple cider vinegar, 2 tsp thyme, 1 tsp salt, pepper to taste, 2 cloves of garlic minced or very finely chopped.

Let them marinade in the fridge for 8-24 hours (sometimes I throw a bit of sliced onions and marinade those as well).

Then I cook the pork in the oven (fan forced) until golden. Not more than 30 minutes. You can flip half-way.

If you want extra spices for pork, I would go for smoked paprika, not regular.

As for ideas on what to do as a gravy… personally I do not like gravy on pork, it takes away from the flavor, unless its a pot roast in which case there several recipes for pot roast using prunes to sweeten it up. Delicious.

I don't like really using chili powder, but I add chipotle sauce for a little spiciness.

https://www.evergladesseasoning.com/products/everglades-all-purpose-seasoning-16-oz