Biden said in December 2022 that the US would not send F-16s, but recently authorized allies to send them instead. 

The Ukrainian said he "Met with Prime Minister of the Netherlands Mark Rutte @MinPres. I am grateful for the leadership of the Netherlands in making key decisions of the Allies in support of Ukraine, in particular on the creation of an aviation coalition. We agreed to start a training mission for Ukrainian pilots on F-16 aircraft in August this year. We discussed the prospects for attracting new partners to the fighter jet coalition and strengthening Ukraine's air defense. Thank you, Netherlands!"