I saw the post from Naomi that the new Yammer webpart is in GA however I can't get it to work. I add it to my page and when I paste in the group URL I get an error message. If I switch to the classic Yammer webpart it works just fine with the same URL.
Actually that is the classic part I’m thinking about. The new one only works if you are adding it to a yammer connected group site. If your site is comm site or standard outlook/Teams/Sharepoint group site I don’t believe it works.
I tried the WebPart yesterday and worked as described by Naomi...just type the name of a Group in Yammer and the cards experience started to work with no problems. I'm on Targeted Release in my test tenants just in case that could be the difference with your scenario
Best Response confirmed by
Tyler Borja (New Contributor)