Prayer in graveyards? Yes.

Praying inside the graveyard, within its walls, is not allowed except for the funeral prayer only.

As for any prayer other than the funeral prayer, like if someone remembers a missed obligatory prayer or wants to pray a voluntary prayer, that is not allowed.

As for Asr prayer, it should be in the mosque near the graveyard, not inside among the graves.

In the prayer area, meaning the place for condolences and such.

No, it is not allowed. A person is not allowed to pray inside the graveyard that is fenced off as a graveyard; prayer is not allowed there.

The scholars differed on whether the one who prays inside the cemetery should repeat the prayer or not, but it is better to repeat the prayer.

This prayer should be repeated. He said: If someone prays inside the cemetery, the Prophet ﷺ said: All the earth is a mosque except the cemetery and the bathhouse.

All the earth except the cemetery and the bathhouse, so it is not allowed for a person to pray inside the cemetery. Yes.