I believe you're referring to what the Biden campaign said to Politico, that Biden could have had (in Politico's words) "some kind of informal interaction with Pozharskyi" but "any encounter would have been cursory". [1] The Washington Post notes that Hunter Biden did arrange for a different business partner to shake hands with Joe Biden at an existing public event, and speculates that he could have done something similar for Pozharskyi. [2] While it's only speculation, that does amount to another possible scenario where the email is accurate. But I wouldn't call such an interaction a "meeting" exactly, and it would scarcely be evidence of corruption.

[1] https://www.politico.com/news/2020/10/14/biden-campaign-lash...

[2] https://www.washingtonpost.com/politics/2020/10/14/hunter-bi...