Is it permissible to supplicate for the deceased 100 times using prayer beads, and without facing the Qibla, and does the supplication reach him?

Supplicating for a deceased parent is legislated and commanded by the Sharia (definition), and it is considered an act of righteousness towards them after their death. There is no objection to repeating the supplication without being restricted to a specific number. It is permissible to use prayer beads (subha) for counting dhikr or supplications, though it is preferable to use one's fingers. It is also recommended to face the Qiblah when supplicating, but there is no harm if one does not.