The OP asked “where” not “why”.......Anyway, the Ask [editor] sections here at iMore and at Android Central were discontinued primarily because the editors didn’t have the time to dedicate their full attention to them. That is not to say that those section won’t return in the future.
The Ask A Question forum of course remains and you can always use that. We have a team of folks that try to answer the questions in there as well as all iMore members are welcome to help answer questions there and anywhere on the forum.