LeoCAD & LDraw follows LEGO's Fair Play[0] policy, so all is OK here.
See LeoCAD's License > Disclaimer.[1]
FTR, Studs logo by default is turned off in LeoCAD, but user may turn in on in the preferences.
[0] https://www.lego.com/en-us/legal/notices-and-policies/fair-p...
[1] https://www.leocad.org/docs/license.html