> Has anyone proposed Unicode code points for them?

There is "Background for Unicode consideration of Cistercian numerals" (https://www.unicode.org/L2/L2020/20290-cistercian-digits.pdf)

And also one in the Under-ConScript Unicode Registry for the Private Use Area (https://www.kreativekorp.com/ucsur/) (https://www.kreativekorp.com/ucsur/charts/cistercian.html)