In the post five-year future of Avengers: Endgame, we see Luis' van at a self-storage facility behind a metallic fence with a label named "LANG":
Considering what we see in Ant-Man,
Scott Lang: Hey, how’s your girl, man?
Luis: Uh, she left me.
Scott Lang: Oh.
Luis: Yeah, my mom died too. And my dad got deported. But I got the van!
It is clear that Luis owns the van. And according to the records, Scott Lang was missing and presumed to be dusted (as his name was found at the memorial at San Francisco).
So why was it stored under Scott's name at the storage facility?