Joe Biden is a progressive.

[OKNancy]

12. I don't think a lot of Democrats have actually read his proposals/vision

Those especially on the left side of the party.

https://joebiden.com/joes-vision/

Here is part of one of the topics.

Vice President Biden knows there is no greater challenge facing our country and our world. Today, he is outlining a bold plan – a Clean Energy Revolution – to address this grave threat and lead the world in addressing the climate emergency.

Biden believes the Green New Deal is a crucial framework for meeting the climate challenges we face. It powerfully captures two basic truths, which are at the core of his plan: (1) the United States urgently needs to embrace greater ambition on an epic scale to meet the scope of this challenge, and (2) our environment and our economy are completely and totally connected.