Actually it is 4.1 trillion. This is as of a few days ago.
"What’s in the $3.5 Trillion Infrastructure Agreement?
Democratic legislators reached a $3.5 trillion Budget Committee agreement to make the “
biggest investment in the middle class in decades and act on the climate crisis.”
The agreement, combined with the $600 billion bipartisan plan, would add up to $4.1 trillion."
Biden's infrastructure plan will invest roughly $3 trillion on roads, electricity and broadband, as well as Medicare, education and climate change.
smartasset.com
The spending will be done over a period of years. What is interesting and sucks is that they will "pay for it" over a much longer period of time.
In terms of supply chain and inflation?
That is a 2 parter. 1 part is covid related...as in shutdowns, slowdowns, etc have affected supply chains. The 2nd part is prices everywhere are going up. Labor, raw materials, etc. We have spent way to much money and that has put upward pressure on all prices.
You also have changes to energy. Energy prices are more expensive. The new policies are more restrictive. That puts upward pressure on energy. That in turn means shipping, transportation, manufacturing, etc become more expensive.
Between covid and the spending our gov is doing prices are going up.