Many people have many different opinion. few prefers pre-greasing and few don't
The answer is yes! If you are using a non-stick tin made, aluminum or ceramic coated pie pan, you must grease it before adding your pie crust.
However, if you're baking a pie on glass or Pyrex plates and a 100% ceramic-made pan, you don't need to grease it
There are a few different ways that you can grease a pie pan. One way is to using butter or vegetable ghee
-Vegetable fats/oils are the best greasing option for the pan and as well as the crusts.
-Vegetable fat like 'Vegetable Ghee/ Dalda' is beneficial for pie baking.
One more tip! Use extra-virgin vegetable fats/oils in the crust; vegetable ghee is that type of fat. These fats get solid in colder temperatures.
If you are using a aluminum or stainless steel pie pan, fail to grease your pie pan, there's a good chance that the crust will stick to the pan
Hey, if you are greasing using cooking sprays, then please check whether it’s free from dimethylpolysiloxane, diacetyl and propellants or not
There are lots of information About-
What are the benefits of greasing a pie pan?
What are the different ways people grease a pie pan?
How to clean pie pans?