The challenge is age-old; young people vote at lower rates than older people.

https://theconversation.com/why-so-few-young-americans-vote-132649

The Democratic party has a strategy that reflects that reality. It could be possibly be changed with a "Biden for the Planet Earth" message as worked for Ed Market in Massachusetts to get out the vote, all things are possible.

Given the ease of signing up to vote by mail from Instagram(brought joy to see that), maybe the tides will change for the better and young peoples intentions to vote will become reality.