Strong agree. I did a bunch of work on capacitated vehicle routing problems - basically the same as this +/- some bespoke constraints for shipping context maybe.

I benchmarked OR-Tools extensively vs e.g. LKH3 + my own hand-written solvers ... it's not a remotely credible library for these things, last time I checked. So ... don't have a lot of faith in Google's offerings here.

http://vrp.galgos.inf.puc-rio.br/index.php/en/updates - where's Google?