"What does the Biden campaign say?
Andrew Bates, a campaign spokesman for Joe Biden, said a review of Biden’s schedules from 2015 finds no record of any such meeting. Officials who worked for Biden at the time told The Fact Checker that no such meeting took place.

“I was with the vice president in all of his meetings on Ukraine,” said Michael Carpenter, Biden’s foreign policy adviser in 2015. “He never met with this guy. In fact, I had never heard of this guy until the New York Post story broke.”

The New York Post article also cites an email from Pozharskyi to Hunter Biden saying he was “going to share this information with the US embassy here in Kyiv, as well as the office of Mr Amos Hochstein in the States.”

“I know for a fact he never contacted me or my office,” said Hochstein, who at the time worked closely with Biden as special envoy and coordinator for international energy affairs. “I provided every record to the Senate investigation, and no mention of this guy was ever made, no emails, no correspondence. I know almost every player in the energy sector in Ukraine. I never met this guy.”

Carpenter said that the vice president wouldn’t have had a meeting with a company executive. “He was the vice president of the United States,” he said. “He met with prime ministers.”

This does not exclude the possibility that Biden briefly shook hands and chatted with Pozharskyi during a public event. Hunter Biden, for instance, helped arrange for a potential business partner, Jonathan Li, to shake hands with his father in the lobby of a Beijing hotel when the vice president made an official trip to China.

Pozharskyi, in the April 17 email, mentions that he spoke to Hunter “yesterday evening.” At the request of The Fact Checker, a Biden aide reviewed Biden’s schedule for April 16, 2015. The vice president gave remarks at the White House Greek Independence Day Reception, between 5 and 6 p.m., and then spoke to the Congressional Fire Services Institute Gala, from 6:30 p.m. to 8 p.m., the aide said."

Is it possible that Pozharskyi was at one of those events? I can't rule it out. But without actual affirmative evidence I'd be incredibly doubtful. That's where having a reference to back up your claims would be helpful.