بسم الله الرحمن الرحيم
(Fatwa: 1192/1052/B=12/1440)
Yes, it is permissible. However, it is better if you close the window while offering salah or hang some curtain or raise the wall of graveyard in front of the mosque high so that no grave is seen from there.
Allah knows Best!
Darul Ifta,
Darul Uloom Deoband
