It seems that the MapMetrics data mentioned either isn't available everywhere or (less likely) their site is being crushed. The data only loads for California and Colorado.
Here too, it seems to be available for western Netherlands, parts of northwest Flanders, all of France, California, Colorado, Albania (fewer trace density it seems though). Maybe they're still importing/processing? Calculating routes for all over the world is a lot of data processing.
There is also a layer named OSM202106 (the default is OSM202103) with even less coverage (e.g. not France), but covering all of the Netherlands rather than just a part of it and covering the USA east coast.
There is also a layer named OSM202106 (the default is OSM202103) with even less coverage (e.g. not France), but covering all of the Netherlands rather than just a part of it and covering the USA east coast.