Yes, I've studied VAC's solution but it is to complex for me to implement. I was hoping there are mere settings that could be configured in Dynon Skyview. Maybe Dynon will add "on-speed" to their OAO in a future release.
I take it your concern is maintaining an airspeed on final which "prevents" stalling.
Something I forgot to mention earlier is that the wing stalls at the same AoA independent of weight, density altitude, loading, bank angle, airplane configuration and more. Aircraft manufacturers offer "approach speed" (or your desire for "on-speed") based on MGW as a proxy for AoA. This works for "winds calm" or "light and variable" days, and this may work where you fly. The dangers to this in most environments are wind shear and wind gusting -- hence the "half wind gust factor on final" rule. AoA systems help with this ... advising you of nearing imminent stalls and reacting by pitching or adding power.
That said... What you've last asked for is available through Dynon's autopilot in advanced mode by commanding a descent based on IAS. Not intended or advised: relying on this leaves pilots complacent and disregarding stall factors previously identified. However, if you know your gross weight doesn't change much on the approach (weight of passengers, cargo, fuel, etc. on final) and you use the same plane, you may be able to approximate the airspeed where you may not reach the critical AoA.