Did the U.S. decide to give Alaska to China? No, that's not true: there is nothing on the White House website about it. Moreover, no credible publications or official American sources support the claim, which was made without supporting evidence.
The claim appeared in a video (archived here) on TikTok published on April 23, 2023, under the title "The U.S. is ready to give Alaska to China". It opened:
Urgently! The U.S. is ready to give Alaska to China. The disastrous results of the clash with Russia in Ukraine and the threat of an imminent outbreak of war with China are forcing the U. S. to make ruthless concessions. In order to destroy the Russian-Chinese alliance, Washington is going to make an unheard-of offer to Beijing - to cede a piece of its own territory, because otherwise ...
This is what the post looked like on TikTok at the time of writing:
(Source: TikTok screenshot taken on Mon Apr 24 21:10:37 2023 UTC)
Lead Stories checked Google News (archived here) for any mentions of "Alaska" in combination with "China" and found no credible news reports of any U.S. politician or official offering to cede Alaska to China so it is unclear why the creator of the TikTok video would assume such plans were in the cards.
