Very, very late to the party though. Look at his history. He sided with Russia over the Salisbury poisonings and has always been unable to see anything other than good coming from them.
The bit in bold I've already proven is untrue with the previous comments from him:
"Russia's shocking invasion of Ukraine is causing fear, misery and death".
"In 2008, I asserted that Putin was rigging elections."
"In 2010, I called for a freeze of his assets."
"In 2016, I asserted that Putin was guilty of war crimes in Syria."
He sided with Russia over the Salisbury poisonings.
As for this point, again, it's not true.
The below comments of not unequivocally condemning the Russian state immediately was twisted as "Corbyn supports Russia" which isn't accurate:
“What I would say is, if we are going to make a very, very clear assertion like that we have got to have the absolute evidence to do it. Because listen – we believe in rules-based diplomacy. We believe in rules-based international relationships. Therefore, you have got to have incontrovertible evidence otherwise you reduce your ability to criticise other people… Assertions and probability are not the same as certainty. I think it is very clear that the nerve agent itself is very similar to those made in Russia, Novichok is what we call it. Obviously there has to be some challenge to Russia on this and that is what is going on. And I would want to challenge the Russians on the production of this as indeed I would any other countries producing something that is wholly and totally illegal.”
He also said the below:
"Either this was a crime authored by the Russian state; or that state has allowed these deadly toxins to slip out of the control it has an obligation to exercise. If the latter, a connection to Russian mafia-like groups that have been allowed to gain a toehold in Britain cannot be excluded. He added: "The Russian authorities must be held to account on the basis of the evidence, and our response must be both decisive and proportionate."
Looking at your previous point that Corbyn has earnings from appearances on Russia today - this is not nearly as damning as a Conservative government taking over £800k in political donations and that Boris Johsnon gave a peership to the son of an ex KGB officer and one of Putin's closest friends. Johnson has such a close relationship to Lebedev that he's met his father as well on a number of occasions and without aids present.