Aspen actually has at least 5 approaches:
- LOC DME-E
- RNAV(GPS)-F
- LOC/DME 15
- RNAV (GPS) Z RWY 15
- RNAV (RNP) Y RWY 15
The first 2 are the only public approaches, and that appears to be what Navigraph charts is showing. Since the other 3 require specific approval, they won’t typically be in the real life nav database and chart subscriptions - unless you are an approved operator (such as NetJets, etc). That’s because they have waivers for obstacle clearance requirements, etc.
There is also a charted visual procedure (Roaring Fork), but it is pretty rare to fly this. The LOC DME-E is the most common. It is incorrectly labeled LOC 00 E in the sim.
Maybe Navigraph can improve the Jepp Chart subscription to include more of these special procedures?