A Full Stack developer does not have to know every technology expected by the client, in the same sense that a Frontend developer don't know every frontend technology.
I think job title should not be limit by the technology one knows. And the client should not presume some tech stack from one's job title without looking into the detailed by interview.
At the company I am working for, when they want to hire someone, they would say 'we want a (a job title) who knows (a list of technology).
For the job title, in case of Full Stack web developer, it is meant to set an expectation that the candidate should be capable of building the whole web app alone by some way. And the technology list section is meant to give the specific requirement for the how.
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A Full Stack developer does not have to know every technology expected by the client, in the same sense that a Frontend developer don't know every frontend technology.
I think job title should not be limit by the technology one knows. And the client should not presume some tech stack from one's job title without looking into the detailed by interview.
At the company I am working for, when they want to hire someone, they would say 'we want a (a job title) who knows (a list of technology).
For the job title, in case of Full Stack web developer, it is meant to set an expectation that the candidate should be capable of building the whole web app alone by some way. And the technology list section is meant to give the specific requirement for the how.