I would mentally prepare to go into it ready to discuss severance. Even if you know they won’t give it to you, just being able to say “given my strong performance and how much I really would prefer to stay, will I be offered a severance package?” will make you feel empowered and in control. And you might actually put them in a spot to actually negotiate if they weren't prepared.
Prep yourself as much as you can on what is expected in your industry given your job, your seniority, and your years at the company in case they do entertain a discussion about severance. If your job level rarely or never qualifies, depending on how bold you are, you might also want to make a quick 2-3 sentence case for why you are disappointed that you are not being offered one (ex: strong performance, give examples, years spent at the company, etc). You can’t avoid them firing you, but I hear many companies often just lay people off with no severance in part because many employees never ask. Maybe if you bring it up, in a very professional matter-of-fact way, you might walk away with something!