Sayyidi wa sanadi Mufti Mohammed Taqi Usmani (Allah protect & preserve him) instructed the attendees at a female burial,

‘The na–mehram should, please, step aside. This a Shariah ruling. ‘

This was in addition to veiling of the grave from all the sides with makeshift curtains.

Darul Uloom Karachi, Old Graveyard, Saturday 2 November 2019. After zohar.