Micro 4/3 sensors do not have to be 4:3 or any specific aspect ratio, the 4/3 measurement is a diagonal measurement across the frame and there have been other micro 4/3 sensors that are not 4:3 that have been used in micro 4/3 certified cameras...
Looking purely at sensor size that would be correct, the Mavic 4 tele lenses use a 1/1.3in (same as the Mini 3/Mini 4) and a 1/1.5in sensor both of which are smaller than a 1in sensor.
However I don't really see the point in comparing the tele...