impossible Burger's sodium levels haven't changed in at least four years:

https://www.health.harvard.edu/blog/impossible-and-beyond-how-healthy-are-these-meatless-burgers-2019081517448

Oh wait, here's a source from six years ago, still 370 mg:

https://nmrdn.com/the-impossible-truth-about-the-impossible-burger/

Seven, still the same:

https://www.washingtonpost.com/business/2019/10/23/an-impossible-burger-dissected/

Apparently there was 30% more sodium at launch, and it was reduced to a whopping 370 mg around 2019:

https://www.businessinsider.com/impossible-veggie-burger-cholesterol-meat-2019-1

So the original formula had over 6× as much sodium as beef. Still very much room for improvement.