Is this kosher for pesach?
Also, are you allowed to use this product with meat?
Kosher for passover for Sephardim, can be used with meat. If used to make a dish before pesach, then it is good for ashkenazim on Passover as well.
What is the reason it can be used with meat if anchovies is listed on the ingredients?
This has an OU. OU policy is if the fish is less than 60 they don’t write OU FISH just OU.
https://oukosher.org/halacha-yomis/many-worcestershire-sauces-contain-anchovies-permissible-add-worcestershire-sauce-meat/#:~:text=The%20OU%20follows%20the%20lenient,must%20be%20labeled%20OU-Fish.