https://www.mongodb.com/es/docs/v4.4/reference/operator/aggregation/setunion/
$setUnion (aggregation) - MongoDB Manual v4.4 - MongoDB Docs
aggregationmongodbmanualdocs
https://www.mongodb.com/es/docs/upcoming/reference/operator/aggregation/setunion/
$setUnion (expression operator) - Database Manual - MongoDB Docs
Use `$setUnion` to combine multiple arrays into one, filtering out duplicates and treating arrays as sets.
operator databaseexpressionmanualmongodbdocs