I don't know what a ConservaDem is.
Yes he was a pain in the butt on family stipends, but if you look at the rest of Joe Manchin's actual voting record, he votes with the democrats virtually every time. He voted to remove Trump twice. He's voted for every Biden judicial nominee. He dragged his feet but eventually voted for the IRA -the biggest anti-Climate Change legislation ever passed by any nation on Earth.
Joe Manchin isn't the villain progressives act like he is.*
*subject to change based in the event of an independent Presidential campaign announcement.