I guess the atmosphere would be too tenuous to try to blow dust away with it (max pressure should be a bit more than Ingenuity's mass/rotor surface, so not much).

How long before a commercial autonomous helicopter-based solar panel dusting service on Mars, I wonder?

No, it's not going to land anywhere near Opportunity.

https://mars.nasa.gov/resources/24729/map-of-nasas-mars-land...