Well, as far as recent films go, Civil War had a commentary. I can't speak for Guardians 2 or Homecoming because I don't own and didn't watch those films via purchase, and don't know about Ragnarok or Black Panther, but since the Russos had commentary for Winter Soldier and Civil War, I'd assume they had one for Infinity War.
Though it definitely sounds like a far cry if there's not as much compared to earlier phases. I still enjoy commentaries on earlier films like The Incredible Hulk, The Avengers, and First Avenger.