Yes, but it's a broad concept. Very basic cooking skills, like starting a fire and cooking meat, or boiling water for drinking, absolutely, in most situations those basic skills could help you to gather and eat food from an environment safely.
"Cooking skills" can cover a lot of different areas... and the value of certain cooking skills will depend on context.
In other words, Knowing which salad dressing goes well with shrimp will not necessarily help you if you are lost in the Australian Outback.
Knowing how to prepare certain types of food can be an important survival skill, absolutely, in the right context.
For example, there are a few fish that are poisonous if not prepared in the right way. They could be an important food source, if they are available, and you happen to know how to prepare and cook them... but that knowledge is no help in the Himalayan mountains, or the Sahara desert. Different cooking skills would apply there.