Is there a technical reason why there are seemingly no smoke detectors that are battery operated, dual sensor, and interconnected?
No Demand
The demand for interconnected is associated with new homes in many jurisdictions. I don't know of any places (there may be exceptions, probably California if anywhere...) where they are required to be interconnected unless a home is new or, possibly, substantially renovated. When a home is new or is substantially renovated, it is easy to run wires between the detectors and to add wires from the first detector back to a power source.
So the need for &quot;battery&quot; is made obsolete by the need for &quot;interconnected&quot;. You don't need battery if they are interconnected, you don't need interconnected if you are in a situation where you don't want to run wires back to a power source (because if you don't want to connect to power, you probably don't really want to run wires for interconnecting them either).
End result:

Battery power for individual detectors in older homes. (Unrelated, but now typically &quot;10-year batteries&quot; instead of &quot;replace battery when you hear the chirp&quot;).
AC-powered for interconnected detectors in newer homes.

I don't think dual-sensor has much to do with it, though due to power requirements (and possibly a higher price-point) that may be more common with AC-powered, interconnected detectors.
I didn't catch the &quot;wireless&quot; part originally. For a bunch of reasons, I would prefer wired to wireless for smoke detectors. Wireless at many levels (from Bluetooth to WiFi to cell phones...) has enough problems that for life-safety I'd prefer wired, when practical. As long as this is new construction, wired seems quite practical, and new construction is the primary demand source for interconnected.