Problems in preview with React integration

Hi, we are traying to configure preview in Bloomreach with react and we have problems. We cant see edit button in components.

In documentation we have found that _meta tag needs to have anothe beginNodespan tag. I have not it, Does anybody know the reason?

Some moths ago we implemented a poc with preview, and in this enviroment we can se the button in preview and meta/beginNodespan has value:

Thanks in advance.

You need to use BrManageContentButton

Thanks for your help Nicholas, but I had it in my code and It seems not to be the problem.