As has been said before:

Detection =\= Weapons quality track.

Low frequency search radars have been able to detect certain stealth aircraft under specific conditions for years. However, those wavelengths are not well suited to guiding weapons onto a target. They can just tell you that there’s likely an aircraft in that general direction. Often they can’t even tell you altitude.

So you could maybe put a missile in the rough grid square of where the aircraft might be, but even if the missile has its own onboard radar, it will have a difficult time locking the target.

The true purpose of “stealth” is to deny locks by radar guided weapons.

So while Star Link might be able to tell you that there’s a stealth aircraft in the area, the best you could do with that information is to scramble your own fighter to that location, and attempt to find the targets themselves. But due to new long-range (BVR) missile and radar developments by the US… those intercept fighters will be dead long before they can get a weapons quality track.