My ex boyfriend killed himself and now a night raven appears every day at the same house he killed himself in, what does this mean?

It means nothing without more details like how do you come to see this bird everyday? Did he live there alone? With family? Was he going through a dificult time or was this an out of the blue event? How much time has passed since his death? Did the birds appear immediately or sometime afterward?

OK so he had 5 kids they were my step kids for 5yrs, in March 2019 he raped his 15yr old daughter so they kids were taken away and I left him, so he was there alone and killed himself on her 16th bday in November 2019, yes the bird showed up after they found and removed his body 5 days after he did it and it only appears at night and it never faces the house he did it in.

It can mean anything you want it to, But no, it means nothing, we often want things to mean something more after a death

You didnt mention if the house is occupied or not ? That can make a big difference. Haveing no activity invites certain situations to avail itself to birds and rodents as well as other bugs. It may just be simply that are birds can be creatures of habbit and it feels comfortable there.