Did you know you can store smoked salmon at room temp pretty much indefinitely in an unopened package?

Food storage has gotten really good, all the tricks of smoke, sugar or salt of our ancestors with now radiation sterilization and other cool tricks with science.
All that to say. It’s probably fine. You just bought it and I’m sure this was made to last as long as it can as reliably as it can so that they don’t lose money.

Most best buy dates are just made up anyways and not based on much. Check for gas build up, a weird odor, extreme discoloration, or foreign objects or growths. That will get you through pretty much every rotten food type without having to taste it.

That’s said, where are you shopping that has a mixture of Japanese, Chinese, French, and robot codes?