There's a bit about the car in the video above - an OSBI official answers a few questions but is vague.
"As soon as we discovered that vehicle, our investigators worked extensively and thoroughly to try to get, gather as much information as they could to try to help solve this case."
He is asked if they have money, if they have a phone, do they have their wallet, do they have their belongings?
OSBI official says, "That is something that we're still trying to look for, to search, it's undetermined at this time." ???
Then he's asked if they (belongings?) were in the vehicle and he said, "We cannot confirm that." ???
So, possibly their belongings weren't found in the vehicle but it is unknown if VB and JK have their belongings...
ETA: Also per the video, a family member said on SM that Veronica's last phone ping was where the car was found.