Biden has changed his mind:
https://www.dailymail.co.uk/news/article-12103037/Biden-allow-European-allies-Uk...Ukraine could receive 'game changing' F-16s as White House
'tells European allies it will not block export of fighter jets'

The F-16 jets are at the top of Ukraine's wish list of weapons to fight Russia
Kyiv is preparing to launch a counteroffensive against Putin's invading forces
By Chris Jewers
Published: 23:18 AEST, 19 May 2023
The Biden administration has told its European allies it is ready to allow them to send 'game changing' fighter jets to Ukraine to use against Vladimir Putin's forces, according to reports.
The White House is coming under increasing pressure to help Ukraine procure the US-made F-16, which are in the arsenals of a number of European countries.
However, any country would require the United States to sign off the transfer of F-16s to Ukraine on account sensitive US technology being on-board the jets.
According to CNN, White House officials have signaled to its European allies in recent weeks that it is willing to allow them to export the jets to Ukraine, which is currently gearing up for a counteroffensive against Russia's invading forces.
The network cited sources familiar discussion, adding that they said Washington remains reluctant to donate any of its own F-16s towards Kyiv's war effort.
In contrast to these numbers, the F-16s - also known as the Fighting Falcon or Viper and made by Lockheed Martin - are the most popular fighter jet in the world.
Nearly 4,500 are deployed in various countries around the world.