The thing is, the line of argumentation that they are "protecting" the terms "steak, sausage, burger" etc will probably work given that the EU allow protection for Cornish pasties, stilton cheese and the like. There is already a precedent for it, in a loose mannar.
I've checked the date on this article, and it's not 1 April.
https://www.theguardian.com/food/2019/apr/04/eu-to-ban-non-meat-product-labels-veggie-burgers-and-vegan-steaks