Apps built for instinct3solar45mm do not appear in the Connect IQ Store for users of the Instinct 3 - 45 mm, Solar, Tactical Edition (model 010-02934-50). The SDK device list has no separate Instinct 3 Tactical device, so developers cannot add it to the manifest; the Tactical edition presumably shares the instinct3solar45mm target but has its own hardware part number, which the Store does not map.
This looks like the same Store-side mapping issue as CIQQA-3813 (Instinct 3 Solar 50 mm). Users have reported the same problem for other apps, e.g. the “Instinct 3 Tactical Solar 45 mm” thread in the App Showcase forum. https://forums.garmin.com/developer/connect-iq/f/showcase/440496/instinct-3-tactical-solar-45-mm
