The Kunena team has announce the arrival of Kunena 6.2.6 [K 6.2.6] which is now available for download as a native Joomla extension for J! 4.4.x/5.0.x. This version addresses most of the issues that were discovered in K 6.1 / K 6.2 and issues discovered during the last development stages of K 6.2
Topics that are moved into this category are generally considered to be closed. Users may want to add additional information but these topics should not be resurrected in order to discuss new problems or unrelated matters.
If you want the public to be able to view a category (and that also includes allowing Google search to index the page(s)), then you should make the following changes to the category Permissions:
Access control type = User Groups Primary User Group = Public Primary includes Child groups = Yes
If you want to change whether people can create new topics or post replies, choose the appropriate options that are shown on the category Permissions tab. I hope this helps.