Purity III was updated two months ago: "Version 2.0.2 21 Oct, 2022 Update for Joomla 4.2.3". Joomlart declares support for kunena: "Purity III is compatible with most of popular 3rd party Joomla extensions, such as: EasySocial, Kunena, JomSocial, Mijoshop, and more to come based on user's request."
After reading the documentation, I used the invitation to download Purity III. Do I understand you correctly that Joomlart refuses to fulfill its obligations?
P.S. I was very surprised by your emphasis on the word FREE. Yes, it is a FREE template. Do you think, Saguaros, the word "FREE" justifies cheating Joomlart users?