Interesting anachronism, God tells Moses what the Hebrews should do regarding Passover celebration when they (or their descendants) are travelling in a foreign country. I mean, the Israelites did not have a country yet, let alone an opportunity to travel to foreign countries.
But, the big news is that we've moved on from Sinai to Paran. Moses asks his father-in-law to stick with them--who remember he was still there. God is still understood as inhabiting a particular space. Indeed, the passage closes with this phrasing that makes it sound very much like YHWH is a genie in a bottle that is the Ark of the Covenant.
And whenever the ark set out, Moses said, “Arise, O Lord, and let your enemies be scattered, and let those who hate you flee before you.” And when it rested, he said, “Return, O Lord, to the ten thousand thousands of Israel.”