Okay, here’s your billions:
That is not an oil refinery. Nor is it one of the existing oil refineries you mentioned.
That facility is taking Natural Gas liquids, primarily ethane, and converting to feedstock for the chemical industry.
The following has more information from the Shell web site. Shell calls the facility a petrochemical complex. A few media types have mistakenly called it a refinery. It will not accept crude oil and it will not produce gasoline, diesel or fuel oil; it is not a refinery.
I agree with your first statement about billions of dollars being spent to expand our domestic chemical (including petrochemical) industry. I do not agree that there is much in the way of oil refinery expansion currently being planned. There is some expansion/upgrades planned at a couple of refineries in Texas to accept more of the light oil from the Eagle Ford versus the heavier oils currently imported from overseas.