Yes, I heard of it back at the turn of the century, from a devout Catholic friend of Lebanese extraction.
The apparition has not been approved by the Church. Our Lady could appear above a Coptic Orthodox Church, but would she?
Here is an interesting article. Egypt was just coming out of the 6 day war around that time.
https://www.catholicworldreport.com/2017/04/26/our-lady-of-zeitoun-and-christianity-in-egypt/