This is a so called Great Hall from our Leniland Bedrock Server. (Minecraft Java & Bedrock 1.19)
If you are using WorldEdit please use [//paste -e] to also paste the entities like armor stands etc.
It is one of many pieces of the Leniland Bedrock Server, making it possible to create your own adventure map.
Find more videos of the Leniland Bedrock Server at YouTube: https://www.youtube.com/c/LenilandStories/videos