A lot of things here were nothing more than daily necessities for the 2023 Avengers.
Just like how developed nations wouldn't keep the existence of cars, planes and ships a secret from less developed countries, the Avengers wouldn't stop using them in front of Luke.
For example, the yellow spaceship, the Quantum Tunnel for passing through the Quantum Realm, and the fully nano-enhanced Mark 85 armor that Tony occasionally flew out and returned in - just the appearance and details of these things were worth studying.
Luke might be busy brushing the meat, but his attention was mostly focused on the information projected by his lenses.
Suddenly, he frowned and turned a skewer that was still a little short of heat.
He had been under surveillance the whole time, and didn't want to reveal too much of his ability to sense things.