convert content types to forums and view in the forum tables

second problem from a site passed from d7 to d8
all right, perfect import, however
on the d7 site I populated some forums through rss with feeds, but the transfer from d7 to d8 takes them away from the forum tables, because they were not actually forum topics but other types of content that I had posted to the forum entries, okay irrelevant,
but I found them as other types of content on the d8 site
then I used to make these other types of content as forum topic types with attached forum field, so almost all right, but they are not visible in the forum tables, however, if I recall the taxonomy term of a specific forum, they are listed together
so the question is: how do I view converts in forum topics in forum tables?
thanks to those who give me the solution

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