what do people who believe in free will… actually believe in?

Whenever I talk to someone about free will, the answer is always that it is given to us by god. It always goes in circles. Somehow, it always ends with them indirectly agreeing with me, but when I say: "...so you DONT believe in free will?" They start sputtering around it and trying to backtrack.

Here's a roughly articulated example of what I believe in, just to add some context (I wrote this at midnight bc I couldn't sleep, spare me):

We cannot conceptualize a reality outside of our existence. This is because the reality that we are fed has been carefully crafted and constructed by factors that predate the mere thought of our conception. By factors such as our predecessors, who also are victim of such a life through their ancestors and their ancestors and so on and so forth.

It’s like only being given the option to pick between vanilla or chocolate ice cream. They are the choices that our parents were given, so ultimately they are choices given to us. If that didn’t make sense, then I want you to name an ice cream flavor that no one’s ever created before. The point is, you can’t. Even if you try to, it’s going to loosely be based off of the ice cream flavors that you already do know. You cannot go outside of those options. The choices that exist now are your only choices.

The only thing we are able to do is ideate or entertain the notion that there are more choices than the ones we are given, but within the confines of our perceived reality, these illusions will be based upon our own ideas/perception of what reality is. We know nothing else, therefore we cannot choose anything else.

These are my arguments, they usually agree... until they don't! I'm confused.