My big maybe is that Prigo was exiled to Belorussian to shape up the pathetic Belorussian army and his Wagners. To invade Kiev in a few months. Putin/ Russia will fund them and supply them with weaponry.
Why would the Belorussian army fight in Ukraine? Its not their war. That would probably make them revolt against their Russian masters. Putin lost most of his elite VDV Paratroopers when he used them to invade Kyiv on day 1. Putin may get overextended here.