I am familiar with the Passover Theo, and I know they were celebrating Passover then but I never pondered on this you presented...rather focused on Jesus’s breaking of Bread and the wine in remembrance of Him in relation to his crucifixion ahead.... and the happenings as they sat together. hummm.
So the bread and wine..basically changed the equation of the Passover Supper to that of Christ himself being the “Lamb”....and because of Him God would “Passover” us because He would see us thru His son...and His sacrifice.
I have to look into this further.