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You need to keep your Samsung Account logged in to restore your Bixby Data.

is it still stucked? haven't it turned on still?

Yes as you have seen in huawei phones, it can be used but the camera system had to be configured, made that way. But in samsung they dont make like that. The make the primary camera used for zoom and fir the type of hardware in primary lens. Althoug...

typically updates are to fix or improve software capabilities. it doesn't have control over hardware. for your questions, 1. it cant be done because a zoom lens and a telephoto lens is too different from each other, it isn't a control over software....