Well that didn't take long.
https://www.independent.co.uk/news/world/americas/us-politics/trump-musk-youth-vote-approval-rating-b2697754.html
A new poll shows President Donald Trump’s much-vaunted success with younger voters seems to have stalled, as his approval rating among that demographic continues to fall.
Just 39 percent of adults under 30-years-old who responded to the latest Economist/YouGov poll reported a favorable opinion of Trump. That number stood at 50 percent just two weeks ago. Adults in the 30- to 44-years-old bracket who view him favorably also dropped from 45 percent to 42 percent.
Overall, 46 percent of respondents approve of Trump’s second presidency, according to this week’s poll, a drop of three percent compared to late last month. Similarly, just 46 percent of respondents view him favorably personally, a drop from last month’s 50 percent.