Not totally sure, it should only go up if you are in the radio mode on the factory head-unit. If you're listening to a tape or cd, it should be down. That's why the feature was important to me, I almost never listen to the radio and would prefer the antenna to just stay down.
Most aftermarket units will extend your antenna as soon as you power it up, regardless of what input you are using and there is no way to retract it. Even though I have mine working how I want, I'm considering moving to a small antenna.
Ah sorry, not sure what happened: LINK
Just busted mine, but this is a really easy alternative: LINK
AntennaMastsRus - Conversion Kit... https://www.amazon.com/dp/B07B8XSTG6?ref=ppx_pop_mob_ap_share
This literally took me 2 minutes to install and it looks really sharp. Doesn't flinch at the wash