Sorry, sadly, no, it is not possible to access sidewalkWidthLeft and sidewalkWidthRight similar to how you would access the street width (as above). The sidewalk widths are stored in the street segments and the street shapes, and the sidewalk attributes do not get transferred to the dynamic lot shapes like the street width does.
Yes, the street width is only for the street part and does not include the sidewalk. I do understand your use case and that it would be nice to know how wide the street is including the sidewalks, but unfortunately, I don't know how to get that info.
I understand thanks for the information!
Provided that I know nothing about Python, would it be possible to use it to work around this issue? I could try to learn it in case