Link to Impossible's trademark (for nutrition - they have 18)

https://trademark.trademarkia.com/impossible-nutrition-87116...

This was from 2018 (important I think).

Another was this: https://trademark.trademarkia.com/impossible-85578345.html

But the class is not a super overlap with impossible foods.

Here is impossible foods mark.

https://trademarks.justia.com/861/02/impossible-86102158.htm...

2013 was the filing date here.

With an english language word, the trademark protection is (generally) going to be a bit narrower (ie, specific class etc).

For what it is worth, at a 10 second glance this is not the slam dunk little vs big player thing.