I'm assuming you know about the legal implications of getting a formal diagnosis and still want to get one. Here's what I know from my experiences:
They let me talk about why I was there, with a lot of unstructured conversations, after they narrowed things down, they mostly just asked me more specific questions and had me fill out a few questionnaires. It took a few months of appointments to get it finalized, because very few psychiatrists worth their salt will diagnose someone with a PD after only a few sessions. Don't expect it to be a one-and-done.
I know you have he/him pronouns and I respect that 100% BUT, if you are AFAB, be assertive of what you know about yourself, and be aware of the sex biases among cluster B disorders. My previous psychiatrist kept diagnosing me with anything else they could to avoid putting ASPD on my chart, even though I had the CD diagnosis as a child. Their reasoning? "You present with antisocial traits, but they can be explained by a traumatic upbringing." (As if personality disorders don't have a heavy chunk of their origin from trauma, regardless of sex.) In other cases, "ASPD is a male disorder."
- If you are asked for examples of things you have done to fulfill the "Failure to conform to social norms concerning lawful behaviors, such as performing acts that are grounds for arrest," point, be mindful of what they legally can and can't report.