The truth is that British officials froze the bank account of about $23 mil belonging to Mr. Zlochevsky, owner of Burisma, for accusations of money laundering, and he had to fight in court to get it back. The Ukraine prosecutor did NOT cooperate with the British as in not giving them documentation.
Shokin did seize some assets that belonged to the family (plots of land, a big house, a luzury car) in Feb. 2015. It was released in Dec. 15th because Shokin did not meet the burden of proof to remove assets (a law had been passed tightening the rules for seizures). No one from the prosecutors office was at court because they believed the jusrisdiction had changed, but the decision to release was not made until Jan 2016.
It was considered mismanagement by the US and allies and the IMF and there was a public outcry in Ukraine. They scrambled toget the seizure reauthorized and it was in Feb. 2016. However, the prosecutor's office looked bad. And then the seizure was then canceled in Nov. 2016.
Wikipedia has a nice article that has Shokin issue spelled out well.
en.wikipedia.org
United States intelligence community analysis released in March 2021 found that proxies of Russian intelligence promoted and
laundered misleading or unsubstantiated narratives about the Bidens "to US media organizations, US officials, and prominent US individuals, including some close to former President Trump and his administration."
[8][9][10] The New York Times reported in May 2021 that a federal criminal investigation was examining a possible role by current and former Ukrainian officials, including whether they used former Trump personal attorney
Rudy Giuliani, who was the subject of a separate but related federal investigation, to spread unsubstantiated claims.
[11]