Got few questions😅

If i post in certain community is the post visible to my every followers and also to the random users who haven't subscribed to that particular community? Or its only visible in the community?

And, also if i made two post, one on a community, and same post in my blog?
How genuine is it and how good is it for the viewers?

Watched your video, great work.
Clear voice, well narrated, and perfect screen view during explanation😊