As far as I know the fixed gear, geared hubs are the only ones that can be driven from the left.
The options for the fixed gear, geared hubs are either ancient, rare and with really narrow ratios or the modern s3x which has sadly been discontinued.
All the rest freewheel, meaning input has to be clockwise, requiring a jackshaft.
There is a way to convert the old AW 3 speed hubs to 2 speed fixed gear hubs, with a 3/4 and direct drive. Problem is: you either need a bridgeport and a carbide end-mill or have to grind down pawls and the use a dremel on the ratchet ring inside of the hub.
The second option, has no pictures or drawings, only a brief description from the man who had done it on several AW hubs and even a modern alloy SRF3 hub. The second option for the AW conversion is in the queue but that's waiting on some bigger projects to get done first.
There is also a bendix 2 Speed coaster brake with a cable actuated shifting, that 20 years was the cheap and easy way to get a multispeed fixed gear bike. If I remember right, the clutch of the coaster brake was welded/brazed to the hub and the brake shoes removed.
Post in thread 'Sprocket Size'
https://motoredbikes.com/threads/sprocket-size.62840/post-664663