Righteous angels executed God’s judgments and transmitted prophecies and directions, including the Mosaic Law. Since we now have the complete Word of God, angels may not need to convey divine messages.
خَدَمَ ٱلْمَلَائِكَةُ ٱلْأَبْرَارُ كَثِيرِينَ مِنْ عُبَّادِ ٱللهِ أَمْثَالِ إِبْرَاهِيمَ ،‏ يَعْقُوبَ ،‏ مُوسَى ،‏ يَشُوعَ ،‏ إِشَعْيَا ،‏ دَانِيَالَ ،‏ يَسُوعَ ،‏ بُطْرُسَ ،‏ يُوحَنَّا ،‏ وَبُولُسَ .‏