If your instance defederates from another one both dont get updates of the other instance anymore which means that you cant interact with any community or user on that instance. I dont know if the content from before the defederation also gets made unavailable or if it is still up.
If your instance defederates from another one both dont get updates of the other instance anymore which means that you cant interact with any community or user on that instance. I dont know if the content from before the defederation also gets made unavailable or if it is still up.