Boeing Tech Manual offers the following regarding single A/P approaches.
Full automatic approach and touchdown capability are not available. FLARE is not annunciated, and stabilizer trim bias is not applied.
An A/P go-around is not available.
The FCTM instructs "For single autopilot operation, the autopilot must be disengaged no lower than the minimum altitude listed in the limitations chapter of the operations manual. ( 50 feet AGL at my airline)
It further states that for a CAT III that both engines and autopilots are required to be running and engaged.
Limits on glide slope for an autoland are as stated 3.25-2.5.