Most of the courses here would accept "They have a lot of luggage" for this, or "Their bags are numerous"(still cringeworthy, but better) , but I didn't even want to try them with this course. That said, binoculars as a singular and luggage as plural? Please.
I thought that the creator of this sentence used "their" instead of "there", a mistake that many native Englis speakers make, including me, and I wrote "There is a lot of luggage." It was not accepted.