Question-Answer generation using Haystack 2.0

[NILICK]

It seems that there are not any classes such as QuestionAnswerGenerationPipeline, RetrieverQuestionGenerationPipeline, and QuestionGenerationPipeline. I am using Haystack 1.24 currently and it has good options for QA. For example, there is a complete tutorial in this subject.
I want to switch Haystack 2.0, but I can't find any docs about QA generation using Haystack 2.0. Can you help me in using Haystack 2.0 for QA generation?

[masci]

I re-opened #5992 because we reverted the way we implemented this feature in the first beta and we'll try another approach soon.
At this moment users have to manually build those kind of pipelines unfortunately, moving to discussions so others can help.