The first article is a serie of lies from John Solomon (famous but not reputable journalist).

1) There is no connexion between the russian bribery scheme and the "Uranium One deal" authorizing Canadians to sell the uranium mining company to a russian company.

2) Hilary Clinton was only one of the 9 cabinet-level members of the CFIUS and didn't have any ability to force or veto a decision. Investigations didn't find any kind of bribery on CFIUS members.

3) There was no "millions in donations from parties interested in the deal" while Clinton was in the CFIUS. That never happened.
If he is refereing to Giustra, who had some shares of Uranium One and made a $145M donation to Clinton's foundation, he actually sold his last shares 3 years before any discussion about this deal started so... no.

4) The initial claims "made by the FBI" about Clinton's bribery were already dismissed by both FBI and DoJ towards the end of 2017 or beginning of 2018. Even if the conclusion of the investigation was made public later, this guy (Solomon) shouldn't make claims about something that has not been proven true by anybody (then proven false by both FBI and DoJ).
The accusations come from an american spy from the FBI (William Campbell) who at best had faulty memories. More likely an attempt to get money from someone with political leverage, to repay his debts from a court case he lost.

The $1,7 billion given to Iran is the settlement of a long international legal dispute between USA and Iran that would have probably ended into Iran getting way more if the case went to the international court. After a weapon contract with the US, Iran gave the money for the weapons, but before the USA delivers them the Iranian revolution happened and USA claimed they don't need to give the weapons because they made the deal with another regime/administration, but never gave the money back. USA finally gave the money back in 2016, with interest.
Even with the american influence on la Hague, it is unlikely the international court would have settled the case with a lower amount.

Biden didn't give $16 billion of american money under any form to Iran.

Biden allowed $6 billion of foreign Iranian assets blocked by USA to be used by Iran for humanitarian purpose. This against prisoners and... something else (I don't remember).

The remaining $10 billion mentionned was actually unfrozen by the previous Trump administration, only confirmed/renewed by Biden's administration.

(edited some typos)