Charles Ellicott Commentary Genesis 45:16

"And the report thereof was heard in Pharaoh`s house, saying, Joseph`s brethren are come: and it pleased Pharaoh well, and his servants." — Genesis 45:16 (ASV)

It pleased Pharaoh... — It was of great importance, regarding the future position of the Israelites in Egypt, that they should go there, not as men who had forced themselves on the country, but as invited guests. Hence the information that the arrival of Joseph’s brethren was a thing pleasing to Pharaoh, and hence also the fullness with which his commands are recorded.