It shall be a statute forever throughout your generations, in all your dwelling places, that you eat neither fat nor blood.
#leviticus 3:17

The people of Israel are forbidden to eat the blood and visceral (organ) fat of clean animals. The broader context of this and similar passages shows that this only refers to organ fat. Subcutaneous fat around the muscles is allowed. You don't need to trim that off unless you don't like it.
#vayikra

https://www.americantorah.com/....2021/01/26/go-ahead-