R1, R2, R3, R4, … could become R1-R4 on order_refs(foo) of the KiCost file have the function to do that.
https://github.com/hildogjr/KiCost/blob/master/kicost/eda_tools/eda_tools.py

I did implement on my pull request because I have to check if “R1-R4” will affect the search box.

I also added a example (acquire-PWM - iBOM.html.zip) to see why I think this is interesting.