Can we modify Kanban board to just show the type of issues
That would make the board completely useless. A board is supposed to help users work with a set of issues and show them where they are in the workflow/process. If it shows just issue type, it tells us noting of any use.
I suspect you are asking for something other than what you have said - could you explain what you are trying to do in full, instead of asking a fraction of a question?
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