Thanks to @PiersatPenn, I found out about the @LesEnluminures very brief showing of privately owned Lombard Haggadah. It was open to the 4 sons and is BEAUTIFUL. I'm not allowed to post that view, but here are images already circulating.

The Haggadah features 75 watercolor(!) over ink paintings by Giovannino de’ Grassi and apparently is the oldest example of a haggadah following the Italian Nusach. It was last on public display in 1900, in Paris.

Found another photo of the 14th century Lombard haggadah online, of "Nishmat kol chai."

One more: "Marror (Bitter herb), that which we eat, for what reason?" and a wonderful article at @atlasobscura.
https://www.atlasobscura.com/articles/passover-haggadah-medieval-italy.amp?__twitter_impression=true

I saw some v old haggadot last year as well https://twitter.com/drnelk/status/981272120243183624?s=19