I can confirm that I am having a similar issue running LB version 1.0.04 on a MacBook Air Monterey OS Version 12.0.1 on M1 chip. Installing font family Raleway or Gothic A1 with “Light” “Thin” and other variations results in just one type of font in LB while all types are available in other programs. I too have tested on a windows 10 machine and all fonts are available.
Mac Screenshots:
Windows Sreenshot:
