Yes, Beirut was certainly a bombing run. There are videos showing the planes and also catching audio of the planes.
Now, I'm not sure it was a nuke, but a JDAM launched against some ammonium nitrate. Ammonium nitrate was known to be there on an abandoned Russian ship. People say that ammonium nitrate does not explode like that from fires, that there had to be an explosion to set it off.
Now Bibi Satanyahu has claimed that the port of Beirut had fuel for Iranian missiles.