Liv is a line of e-bikes taylored for short people by trek.
Giant & bulls, cannondale have small frames, 15", 16", 17". They may not be in stock in stores. Usually stores make small people buy a bike before they can sit on it.
Aventon has a dozen or more complaints that the minimum assisted speed is 12 mph. That is too fast for pavement I ride on with long trenches between strips. Nobody has found a way to reprogram the controller.
I occasionally hit potholes that were hidden by previous car or rain or snow. I prefer a 26" wheel bike to a 20" wheel bike as a result. Fat tires may help, but are reported to be difficult to get off the wheel. I change my flats myself, so I ride 26"x2.1". The bike won't fit in the wife's car: besides she works in the daytime.