They will know you were probably at a protest, but they hopefully won’t be able to tell you apart from other protestors. Hopefully they won’t be able to tell who did what. If police know you were at the protest you may get a visit later or watched though
Calling it vegan insert non-vegan recipe makes sense if it’s mimicking a non-vegan recipe. Lots of vegans grew up with non vegan food and would like a vegan recipe that tastes similar, and this makes it easy to find using a search engine