The three-speed Honda C50/70/90 series was described as "semi-automatic" because the vehicles had centrifugal clutches but no clutch levers.
The Honda CB400A twin had a lock-on parking brake (the equivalent to a car's handbrake) instead of a clutch lever. It was described as an "automatic" but did not eliminate the need for manual shifting, though it did reduce it from five or six speeds to only two.
The Moto Guzzi V1000 Convert was also an example of an "automatic" with two speeds, as was the CB750A Hondamatic. Both used torque converters.
The pre-unit 650 Thunderbird featured a "Slickshift" which reduced reliance on the clutch lever. Jawa & CZ used a vaguely similar system.
I'm open to correction, as per.