Unfortunately I've come across a few flights arriving with deceased pax on board, all were treated differently.
1) 767-300. Gentleman died in his sleep next to his wife and daughter, gentleman was lay in fwd galley with a blanket over him. Not great for the cabin crew occupying the jump seats.
2) A319. Gentleman suffered a heart attack in flight, despite best efforts couldn't be save. Full flight so was left in his seat with a blanket over him.
3) 757 (I think?). Cabin crew tried to awake gentlemen for descent, he had passed away. Doctor was called for on board and confirmed the pax was deceased, he was left in his seat as it wasn't a full flight and other pax weren't aware he had passed away.
4) 777 from Pakistan, older lady passed away, placed in the toilet for the remainder of the 6 hour flight!