Don’t believe anything Lucas has ever said about having all the movies mapped out. Read The Secret History of Star Wars and you’ll see the parent poster is correct
https://www.amazon.com/Secret-History-Star-Wars/dp/0978465237
Yep, that’s a t-16 skyhopper. I think he referenced it talking to edge before blowing up the Death Star saying he used to shoot womp rats while flying it.
I used to have the toy growing up and shot my siblings and parents with the turret. Good times.
Here’s the toy for reference. https://www.amazon.com/Star-Wars-Power-Skyhopper-Vehicle/dp/B000BPL43G