Scripture records that Mary was saluted by an angel; it is the only instance recorded in Scripture where an angel demonstrated deference to a person.
Ignore that detail at your own peril.
The Greek, if that makes any difference to a Catholic.
The angel greeted her.
https://biblehub.com/greek/5463.htm
chairo‘
Definition: to rejoice, be glad
Usage: I rejoice, am glad; also a salutation: Hail.
Usually people greet each other when they meet. Other people have seen angels and been greeted by them as well.
It proves nothing about Mary and gives no support to the Catholic mythology surrounding her.
Imply what it means at yours.