Why isn't my product review app showing in the add block?

[megawdyaaaa]

hi, I want to ask. I want to add a product review to the website, I have installed the free app but it doesn't appear when I want to add it in the add block. and I'm using the streamline theme, is there a solution so that the app can be used?

I use this app

I hope you can help to provide solutions and methods, thanks.