It's simple to figure out:
Find the specs for your model at
https://en.wikipedia.org/wiki/Lucid_Air#Models
That says Air Pure battery capacity is 88 kWh. I think I remember there's some nuance to that with different versions of the Pure, but we'll go with it for now.
Your EPA rated range on 19" rims with OEM A/S tires is 410 miles.
410 miles / 88 kWh = 4.66 mi/kWh.
The EPA tests are not currently very representative of normal driving. However, you can do much better than 3.1 depending on (primarily):
1. Your speed. The most efficient zone is around 55mph. I know that's not fun and I don't suggest you spend all your time there, but keep in mind efficiency drops exponentially with speed. If you're planning on hypermiling on a road trip, pop on that cruise control to 65mph or whatever is safe, get in the slow lane, relax. Day to day, don't worry about it.
2. Your acceleration. It may be obvious, but it's hard to resist. Don't floor it from every light if you want the best mileage. Be gentle.
3.. Weather. Low temps are not good for range. Rain is not good for range.
4. Tire pressure. Use a real tire gauge, keep your tires at the recommended levels. Or potentially even higher, depending on which tires you have.
EPA efficiency is achievable, but don't try to achieve it as a daily average or you'll have no fun.