I tried removing that conditional, but it didn't seem to have any effect. Quads don't seem to render in builds either for my main project (iOS build), or test project (Mac build).
Definitely understand 2021 is hot off the presses and there might not be much you can do at this point. I'd been holding out for point light shadows, but now that they're in, URP perf gains are just too much to pass up. Worst case, I can just rework things to avoid using quads until you're unblocked. Thanks for looking into it!