LFP battery technology is more affordable than other alternatives. Here are the Tesla models that have LFP batteries.
electrifynews.com
This 2022 article does contain info on LFP batteries:
Tesla is the world's largest electric car manufacturer and many wonder what batteries the company uses. Let's take a look at what we know.
insideevs.com
2021 (OLD) article with video of a LFP / Prismatic battery:
Tesla accustomed us to using lithium-ion cells in cylindrical form factor, starting with 1865, 2170 and 4680, but there is one exception - prismatic LFP cells.
insideevs.com
On the Model 3 Tesla Ordering Page, this statement makes it look like the LFP batteries are using in the standard range vehicles.
Very Cold Weather
For the best long range driving experience in the coldest driving conditions, we recommend a Long Range or Performance Model 3.
(EDIT: Note this statement is NOT under the MY info, just M3)
That sure makes it look like the LFP is used in the stadard range M3 (and MY that is yet to again be available in the US in inventory).
I wonder if the Philadelphia area is "very cold weather". We are looking at a model 3 to add to our old AWD Honda vehicles. So if it's THAT bad, we can take one of the old ICE vehicles. My wife is more OK with buying a tesla if it's not eliminating one of our versatile old junkers. Adding a M3 is cheaper than replacing our Honda Pilot with a MY. So that's why I'm mostly looking at the M3. Maybe in the future we can buy a used higher-end model or something.