Weapon vs normal aircraft track
Virtually any radar in the world can detect and track a stealth aircraft as well as to provide a “kill chain” to direct and guide weapons at it.  The key is at exactly what range they can do this and that’s a function of the radar cross section of the target.  Stealth aircraft typically, depending on the bearing and azimuth a radar illuminates them from have an RCS on the order of a BB pellet; a conventional aircraft eg a SU-27 has an RCS around the size of a two story house.  Certain kinds of radar sets like low frequency radars can detect stealth aircraft much better than X-band radars can but are inferior for miniaturization or for providing weapons guidance, limiting their effective ranges.